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List of JavaScript Kata to Update

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JohanWiltink edited this page Dec 22, 2022 · 302 revisions

This page lists JavaScript kata still stuck in Node 8.x. It's not grouped in any way at the moment.

Any help is appreciated, but I'm still looking for ways to automate common fixes. jscodeshift can be used to transform the code (see example). If you come up with a codemod, please create a similar demo on AST explorer and let me know on https://github.com/codewars/runner/issues/119. That issue also includes some background information.

Since Node 10.x, we've been using Mocha instead of the custom test framework. There are some required changes related to this.

  • The test structure must be describe -> it -> assertions or it -> assertions (i.e., assertions must be inside it, and it cannot be nested). Grouping related tests with describe is preferred if there are many test cases. Note that tests with an invalid test structure might still look valid in the output panel. Automated updates have skipped over those with invalid structure.
  • Test case callback passed to it is no longer immediately executed. This can be tricky to notice.
    • To avoid common issue with closure within a loop, all var within all tests have been upated to let when possible (if tests passed after the change).
  • Test case defined with a callback. Some authors likes to write it("test", _ => {}) which creates a asynchronous test (it("test", (done) => { doStuff().on("end", done); })). Most of these have been fixed.
  • Old assertions are still available in Node 10. It's also available in Node 12 with const Test = require("@codewars/test-compat");. Updating to Chai assertions can be done later with codemod, so it can be skipped.

Use the new "Fork" feature to update kata:

You don't need to open an issue/suggestion and wait to edit. Forking a kata in a language is similar to forking an approved translation, but better because

  • all languages can be forked, including those added directly in Kata Editor and the original language
  • it's never outdated because it forks from the kata

You should see "Fork" when viewing a kata with the language you've completed in selected. Click that to open a translation editor with the current version filled in. The proposed changes can be merged or rejected after publishing, just like translations.

Notes

Native BigInts in Node

Native BigInts are available in Node 10.x. JS versions of all BigInt katas (arithmetic operations to numbers represented as strings) should be removed once Node 8.x is deprecated in the future.

Though they should've been removed already anyway since bignumber.js is installed in the environment, which means require would have to be disabled. Which does nothing anyway because people can just copy the entire minified source code from the bignumber.js repo into their solution, and things go out of hand very quickly with this.

List of Node 8.x Kata

  1. "AURUM RECLUDIT CUNCTA" - yet another FUBAR kata with restrictions which relies on specific setup of Node 8.
  2. "console.log" and the Lexical "this"
  3. "string".forEachMatch(regex, callback, [context]);
  4. "TRaduttore".tr( [ "u", "tt" ] , "it" )
  5. (Insane) N Warriors and a Lamp
  6. (Ready for) Prime Time
  7. [AI] Play Me : CodeWarsRunner I (Introduction)
  8. [AI] Play Me : CodeWarsRunner II (Acceleration)
  9. [BF] Even or Odd?
  10. [BF] Fibonacci Sequence
  11. [BF] Quine
  12. [BF] Reverse input
  13. [BF] Sort string
  14. [BF] Squares
  15. # Counting 1: I Want Some Subsets, Not All!
  16. #For Kids# Date decryption.
  17. #For Kids# Date encryption.
  18. #01 - Music theory - Minor/Major chords
  19. #1 Sequences: Pure Even Digit Perfect Squares (P.E.D.P.S)
  20. #4 Matrices: Process for a Square Matrix
  21. #6 Matrices: How Many Matrices Do These Elements Produce?
  22. #7 Matrices: Focused on the Contour
  23. #8 Matrices: Up and Down Sorting For Each Column
  24. 1 Two 3 Four 5!
  25. 1RM Calculator
  26. 1st day of month that are Sunday in a year range
  27. 2 DNAs sequences, coding for same protein?
  28. 2048!
  29. 5command - Esoteric programming #1
  30. 5x5 Tap Code
  31. 7-segment converter
  32. 80's Kids #1: How Many Licks Does it Take?
  33. 80's Kids #10: Captain Planet
  34. 80's Kids #2: Help ALF Find His Spaceship
  35. 80's Kids #3: Punky Brewster's Socks
  36. 80's Kids #4: Legends of the Hidden Temple
  37. 80's Kids #5: You Can't Do That on Television
  38. 80's Kids #6: Rock 'Em, Sock 'Em Robots
  39. 80's Kids #7: She's a Small Wonder
  40. 80's Kids #8: The Secret World of Alex Mack
  41. 80's Kids #9: Down in Fraggle Rock
  42. 8kyu interpreters: HQ9+
  43. A (no more) bugs trilogy: Episode 3 - Make a Player
  44. A Banking Trouble
  45. A bugs trilogy: Episode 1 - "Let Math.Random(); decide your future"
  46. A Crazy Robot? Who's is behind the scenes to make that?
  47. A for Apple
  48. A functional deck of cards....
  49. A kata is a kata, you can't say it's only a half!
  50. A Knight's Tour
  51. A Man and his Umbrellas
  52. A Memory game array
  53. A Promise is a Promise
  54. A simple Tic-tac-toe class
  55. A Taste of Curry
  56. Aaaaaand theeeeeen
  57. ABC - Esoteric programming #2
  58. Abstract Model Magic
  59. Accumulator Calculator
  60. ACME factory needs your help
  61. Acute, Obtuse, or Right?
  62. AD2070: Help Lorimar troubleshoot his robots- ultrasonic distance analysis
  63. AD2070: Help Lorimar troubleshoot his robots-Search and Disable
  64. Add Length
  65. Add new item (collections are passed by reference)
  66. Adding Arrays
  67. Adding Big Numbers
  68. Adding Binary Numbers
  69. Additionless addition.
  70. Additive Numbers
  71. Advanced Events
  72. After(?) Midnight
  73. Age Range Compatibility Equation
  74. Alex & snooker: points earned.
  75. Alex & snooker: scores.
  76. Alfred's Laundry Robot
  77. Algebraic Lists
  78. Aliens have landed
  79. All Balanced Parentheses
  80. All representations as binomial coefficient, or: How often in Pascal's Triangle ?
  81. All Star Code Challenge #12
  82. All Star Code Challenge #17
  83. All Star Code Challenge #18
  84. All Star Code Challenge #32
  85. All that is open must be closed...
  86. All unique
  87. Alphabet symmetry
  88. Alphabetic Anagrams
  89. Alphabetical Sequence
  90. Alphabetize a list by the nth character
  91. Alphametics Solver
  92. Alternate capitalization
  93. Alternate Square Sum
  94. altERnaTIng cAsE <=> ALTerNAtiNG CaSe
  95. Alternating Loops
  96. Alternative Truth Machine
  97. Am I safe to drive?
  98. Amidakuji
  99. Amount to Coins - Universal
  100. An 'orrible expression on 'is face
  101. An Eventful Bus
  102. Anagram difference
  103. And the Mosckar goes to…
  104. Angle-a-trons and Phyllotaxy
  105. Angular modules
  106. Anonymous Returns.
  107. Answering questions about data with Lo-Dash - 1
  108. Antipodal Points with Same Temperature
  109. AOP - After
  110. Apparently-Modifying Strings
  111. Apply offset to subtitles
  112. Approving Kata
  113. Approximate Fractions
  114. Are arrow functions odd?
  115. Are the values equal?
  116. Are there any arrows left?
  117. Are they the "same"?
  118. Are we alternate?
  119. Are You a One-Liner? #1: divide 2,3,5,7
  120. Are You a One-Liner? #2: multiplication table
  121. Are You a One-Liner? #3: A4 Paper
  122. Are you Geometric or Arithmetic? No, I´m both of them.
  123. Area and perimeter of the ellipse
  124. Area of a Circle
  125. Area of a Square
  126. Area of House from Path of Mouse
  127. Area or Perimeter
  128. Arguments to Binary addition
  129. Array combinations
  130. Array Deep Count
  131. Array element parity
  132. Array Graphics - Lines
  133. Array Info
  134. Array power
  135. Array reduction
  136. Array to HTML table
  137. Array.prototype.push
  138. Array.prototype.splice(from, count, insertItems...)
  139. Array.prototype.splice(from, count, insertItems...) - Advanced
  140. Arrays are Objects
  141. Arrays of cats and dogs
  142. Arrays of Lists of Sets
  143. Article archive and social likes
  144. Ascend, Descend, Repeat?
  145. Ascii Art Generator
  146. ASCII Games: Dance Dance Evolution I
  147. ASCII Games: Flood Fill (Player)
  148. ASCII Games: Warning: Ice!
  149. ASCII hex converter
  150. Assembler interpreter (part II)
  151. Assorted Rectangular Pieces Puzzle
  152. Atbash Cipher Helper
  153. ATM Heist
  154. Authenticate a list of usernames
  155. Auto Sorted Array - Easy
  156. Autocomplete! Yay!
  157. Automaton (Part 2)
  158. Automaton (Part 3)
  159. Automorphic Number (Special Numbers Series #6)
  160. Average Scores
  161. Back to KinderGarten (eeeeeeasy)
  162. Back to KinderGarten 3 : What's this list ? (easy?)
  163. Back to KinderGarten II : Where's Aïcha ? (eeeasy)
  164. Back to the Future?
  165. Balance the arrays
  166. Balance the parentheses
  167. Balance the tree
  168. Ball Launcher Robot
  169. Ball Roll On Quartic Polynomial
  170. Bar Graph - Graphing #1
  171. Barbell racking calculator
  172. Barbell weight
  173. Base64 Encoding
  174. Baseball
  175. Basic Compression
  176. Basic JS - Building a calculator
  177. Basic markdown to HTML
  178. Basic neural networks - Machine Learning #2
  179. Basics - Generators #1
  180. Basics 04: Rotate Matrix
  181. Basket of Fruits
  182. Batman Quotes
  183. Bầu cua tôm cá
  184. BBQ Pitmaster
  185. Be Concise I - The Ternary Operator
  186. Be Concise II - I Need Squares
  187. Be Concise III - Sum Squares
  188. Be Concise IV - Index of an element in an array
  189. Beautiful STAR
  190. BECOME IMMORTAL
  191. Beeramid
  192. Begin your day with a challenge, but an easy one.
  193. Beginner Series #2 Clock
  194. Behind Enemy Lines
  195. Berlin Clock
  196. Berserk rater: CG Vs. Clang
  197. Bet payout calculator
  198. Bicycle gear inch calculator
  199. Big Arithmetic - integer add/subtract
  200. Big Integer Modulo
  201. Big integers sum
  202. Big number problem
  203. Bin to Decimal
  204. Binary Genetic Algorithms
  205. Binary scORe
  206. Binary string
  207. Binary Swap
  208. Binary sXORe
  209. Binary to string
  210. Binary Zoo
  211. Binding within the List Monad
  212. BIO 2013 : Watching the Clock
  213. bit "Wise" #1: XOR-cism
  214. Bit calculator
  215. Bit Plane Return
  216. BitMath: Addition
  217. BitMath: Multiplication
  218. Bitty Words
  219. Blobservation
  220. Block-exchanging reverse
  221. Bloxorz Solver
  222. Boardgame Fight Resolve
  223. Bob - The Automated Manager
  224. Bob's Secret Cipher
  225. Body mass index calculation
  226. Boggle Word Checker
  227. Boolean logic from scratch
  228. Bouncing Ball
  229. Bracket Duplicates
  230. Brainscrambler - Esoteric programming #3
  231. Branch Prediction
  232. Breadcrumb Generator
  233. Breadth-First DOM Traversal
  234. Bribe the Guards of the Crown Jewels
  235. Broken Image - Puzzles #1
  236. Broken sequence
  237. Build a pile of Cubes
  238. Build a Trie
  239. Building a mini search engine
  240. Building a Sequence Cocatenating Digits with a Given Order.
  241. Building blocks
  242. Building Strings From a Hash
  243. Bulk up!
  244. Burrows-Wheeler transform I. Coding
  245. Burrows-Wheeler transform II. Decoding
  246. Buying a car
  247. Buying the Farm : Irrigation
  248. Caesar Cipher Encryption - Variation
  249. Caesar Cipher Helper
  250. Caffeine Script
  251. Calculate age in years
  252. Calculate Hypotenuse of Right-angled Triangle
  253. Calculate mean and concatenate string
  254. Calculate number of inversions in array in linearithmic time
  255. Calculate Price Excluding VAT
  256. Calculate the required interest rate
  257. Calculate Two People's Individual Ages
  258. Calculating Expected Utility
  259. Calculating with Functions
  260. Calculating with objects
  261. Calculator (Addition and Spaces) [Part 1]
  262. Calendar Week
  263. Callback Set
  264. Cambridge Word Scramble
  265. CamelCase Method
  266. Can I have cake?
  267. Can you get the loop ?
  268. Can you keep a secret?
  269. Can you move to Zephland?
  270. Can you test it for me?
  271. Candy count
  272. Candy problem
  273. Capitalize first letter of a string
  274. Capitals first!
  275. Car Door Roulette - Harder Version
  276. Card Counting
  277. Card game
  278. Card game: twenty-one
  279. Cartesian coordinates from degree angle
  280. Cartesian neighbors
  281. Cartesian neighbors distance
  282. Case Reversal of Consecutive Duplicates
  283. Catch me if you can (rolling start)
  284. Centroid I
  285. Champernowne's Championship
  286. Change it up
  287. char_to_ascii
  288. Character Concatenation
  289. Character limits: How long is your piece of string?
  290. Cheating a bit...
  291. Check a Curious Divisibility. (Brute force version)
  292. check for winning box in dots and boxes game
  293. Check if a triangle is an equable triangle!
  294. Check if number is prime without loops
  295. Check if two words are isomorphic to each other
  296. Check RNA Nucleotides
  297. Check three and two
  298. Check your arguments
  299. Checkerboard King Combo Move
  300. Chess piece values
  301. Chessboard Squares Under Queen's Attack
  302. Chicken Sexing
  303. Chinese Zodiac
  304. Chocolate Celebration
  305. Chocolate Party
  306. Choose featured projects for Gratipay's homepage!
  307. Christmas baubles on the tree
  308. Chuck Norris I - Push Ups
  309. Chuck Norris II - One Punch
  310. Chuck Norris VI - Shopping with Chuck
  311. Chuck Norris VII - True or False? (Beginner)
  312. Church numbers
  313. Cipher
  314. Circular Objects #1 - Running around in circles
  315. Class conundrum - Bug Fixing #7
  316. Classy Classes
  317. Classy Extentions
  318. Clay Pigeon Shooting
  319. Clean up your Gibberish!
  320. Clean your shoes rack
  321. Climbing the Leaderboard
  322. Clock Hands
  323. Clock Patience
  324. Closest and Smallest
  325. Closest elevator
  326. Closest friends
  327. Closest to Zero
  328. Clue - Esoteric programming #4
  329. Code Adventurer Guild: BeiJing
  330. Code Adventurer Guild: HongKong
  331. Code-ilocks. This exercise is JUST RIGHT!
  332. Codewars style ranking system
  333. Coding 3min : A*B=C
  334. Coding 3min : Are they symmetrical?
  335. Coding 3min : Balance Attraction
  336. Coding 3min : Count animals
  337. Coding 3min : Eat watermelon
  338. Coding 3min : Excel Puzzle #1
  339. Coding 3min : Excel Puzzle #2
  340. Coding 3min : Find the murderer
  341. Coding 3min : Guess the Hat
  342. Coding 3min : Hacker and change
  343. Coding 3min : Half it II
  344. Coding 3min : Half it III
  345. Coding 3min : Half it IV
  346. Coding 3min : Max Value
  347. Coding 3min : Parallel circuit
  348. Coding 3min : Planting Trees
  349. Coding 3min : Reading a Book
  350. Coding 3min : Remove screws I
  351. Coding 3min : Remove screws II
  352. Coding 3min : Series circuit
  353. Coding 3min : Tidy up the room
  354. Coding 3min : toLoverCase()
  355. Coding 3min : Waiting for a Bus
  356. Coding 3min: Bug in Apple
  357. Coding 3min: Collatz Array(Split or merge)
  358. Coding 3min: Father and Son
  359. Coding 3min: Give me the equation
  360. Coding 3min: Trypophobia
  361. Coding Meetup #10 - Higher-Order Functions Series - Create usernames
  362. Coding Meetup #15 - Higher-Order Functions Series - Find the odd names
  363. Coding with Squared Strings
  364. Collatz
  365. Collision Detection
  366. Color Ghost
  367. Color of the moment
  368. Colored Hexes!
  369. Coloured Lattice Points Forming Coloured Triangles
  370. Combine objects
  371. Combining Records
  372. Common array elements
  373. Common Bit Twiddles
  374. Compact data processing: bit comparison
  375. Compare powers
  376. Competitive eating scoreboard
  377. Complete The Pattern #10 - Parallelogram
  378. Complete The Pattern #11 - Plus
  379. Complete The Pattern #12
  380. Complete The Pattern #13
  381. Complete The Pattern #14
  382. Complete The Pattern #15
  383. Complete The Pattern #16
  384. Completed Mahjong Hands
  385. Complex numbers
  386. Composed Integers Having Prime Factors Only Once
  387. Composing squared strings
  388. Compound Nouns, Common Nouns, and Adjectives Test
  389. CompoundArray
  390. Compression : impossible
  391. Computational Geometry 101: Perimeter and Area of an arbitrary shape (2D)
  392. Compute a convex hull
  393. Compute the Largest Sum of all Contiguous Subsequences
  394. Compute Unix path
  395. Concatenating functions
  396. Concatenation substring
  397. Conference Traveller
  398. Config Parsing: INI
  399. Configure an express server
  400. Connect Four
  401. Connect Four: Unlimited Edition
  402. Connected blocks
  403. Connected blocks (second part)
  404. Consecutive Count
  405. Consecutive k-Primes
  406. Consecutive strings
  407. Conservative Property Proxy
  408. Consonant value
  409. Constrained GCD
  410. Contact Deduplication
  411. Contamination #1 -String-
  412. Control the Beast (controlled components in ReactJS)
  413. Convert an array of strings to array of numbers
  414. Convert Hash To An Array
  415. Convert PascalCase string into snake_case
  416. Convert Sentences to New York, my guy.
  417. Convert the score
  418. Converter
  419. Converting integer to currency format
  420. Conway's Game of Life - Unlimited Edition
  421. Coordinates Validator
  422. Coprimes up to N
  423. Cost of Shopping
  424. Count all the sheep on farm in the heights of New Zealand
  425. Count chains of ones in subsequences
  426. Count the Combinations
  427. Count the connected components
  428. Count the divisible numbers
  429. Count the number of cubes with paint on
  430. Count the Ones
  431. Count the smiley faces!
  432. Count The Zeros: 1 to n
  433. Count word occurrences
  434. Countdown - Longest Word
  435. Countdown to Christmas
  436. Counting DNA Nucleotides
  437. Counting Duplicates
  438. Counting E-Primes
  439. Counting in English one, two, three... to 2 Quadrillion (2,000,000,000,000,000)
  440. Counting Nested Functions
  441. Counting Sort
  442. Counting String Subsequences
  443. Covfefe
  444. Cracking CRC32
  445. Crash Override
  446. Crashing Boxes
  447. Cream of the crop
  448. Create 10x10 array and randomly fill each cell with "A", "B", "C", or "D"
  449. Create a frame!
  450. Create a House Cleaning Rota
  451. Create a password hashing function.
  452. Create Four Letter Birding Codes from Bird Names
  453. Create palindrome
  454. Create the base - Dungeon crawler #1
  455. Create Your Own "Promise.all()"
  456. Creating Elements with React
  457. Credit Card Checker
  458. Cross the Bridges
  459. Crossed words
  460. Crouching Distribution, Hidden Constant
  461. Crushing blows and blushing crows
  462. Cryptic Cave: Episode 1
  463. Cryptography Challenge - Log of Lights
  464. CSV representation of array
  465. Currency Conversion
  466. Currying functions: multiply all elements in an array
  467. Custom Array Filters
  468. Custom concat() Array Method
  469. Custom each() Array method
  470. Custom Setters and Getters
  471. Cut array into smaller parts
  472. Cut me in Pieces but in The Way I Like
  473. D&D Character generator #1: attribute modifiers and spells
  474. D&D Character generator #2: psion power points
  475. D&D Character generator #3: carrying capacity
  476. Dangerous Dates
  477. Dashatize it
  478. dataTypes String to Array
  479. Date Format Validation
  480. Date formatter
  481. Date Sanity Methods
  482. Dave's gamble.
  483. Days in the year
  484. Debug Sum of Digits of a Number
  485. Decibel Scale
  486. Decipher the Message
  487. Decipher this!
  488. Decode Morse
  489. Decode the Morse code
  490. Decode the Morse code, advanced
  491. Decode the Morse code, for real
  492. Decoded String by the Numbers
  493. Decompose double strand DNA into 6 reading frames
  494. Decreasing Inputs
  495. Decrypt this school cipher
  496. Deep Assignment
  497. Deep Freeze
  498. Defeat the Elemental Titans
  499. Defend your castle
  500. Deferred Objects
  501. Defuse the bombs!
  502. Déjà vu Duplicates
  503. Delete occurrences of an element if it occurs more than n times
  504. Deletion in an array
  505. Delta Bits
  506. Depot organization 1
  507. Derive Cipher from Plaintext
  508. Describe the shape
  509. Design a simple markdown compiler with string substitution feature
  510. Determine Results of Pole Vault Competition
  511. Devil's Sequence
  512. DevOps legacy roasting -> disco inferno -> burn baby burn
  513. Diamonds and Toads
  514. Dice roll - D&D #1
  515. Dice Rolling
  516. Did she say hallo?
  517. Difference between two collections
  518. Difference Of Squares
  519. DigitAll
  520. Digits Average
  521. Disarium Number (Special Numbers Series #3)
  522. Distance Between 2 Points on a Cartesian Plane
  523. Distance from the average
  524. Distribute server workload
  525. Divide integers as strings
  526. Divide numbers as strings
  527. Divisible by previous digit?
  528. Divisor harmony
  529. DNA GC-content
  530. Do something "n.times" (Simplifying "for" loops)
  531. Do you speak "English"?
  532. Do you speak retsec?
  533. Dollars and Cents
  534. Dominant array elements
  535. Dominant primes
  536. Domino Tiling - 2 x N Board
  537. Domino Tiling - 3 x N Board
  538. Domino Tiling - 5 x 2N Board
  539. Domino Tiling - M x N Board with Holes
  540. Don't Drink the Water
  541. Don't Eat the Last Cake!
  542. Don't get stressed
  543. Don't rely on luck HARDCORE
  544. Dont drive too long!
  545. Doomsday Basic
  546. DOS era #1: Help!!!
  547. DOS era #2: Attrib
  548. Dota 2 Bots - Pudge's Meat Hook
  549. Double Rainbow!
  550. Double Trouble
  551. Down Arrow With Numbers
  552. Draw a Circle.
  553. Dream Or Reality
  554. Dreidel dreidel
  555. Driving Licence
  556. Driving School Series #2
  557. Drunk friend
  558. Drying Potatoes
  559. Duck Duck Goose
  560. Dude E Free
  561. Dumb News: The Truth About CW Leaderboard !
  562. Dummy Epoch - find the gap
  563. Duplicate Arguments
  564. Duplicates. Duplicates Everywhere.
  565. Easy Cyclist's Training
  566. Easy Diagonal
  567. Easy Line
  568. Easy mathematical callback
  569. Easy Time Convert
  570. Echo
  571. Elections: Weighted Average
  572. Element equals its index
  573. Elevator algorithm
  574. Elevator Distance
  575. Elevator with call buttons
  576. Ellipse contains point?
  577. Elo rating - one game, one pair
  578. Email Validation
  579. Emily's Eccentric Encoding
  580. Emirps
  581. English beggars
  582. Enumerable Magic - Does My List Include This?
  583. Enumerable Magic #1 - True for All?
  584. Enumerable Magic #4 - True for None?
  585. Enumerable Magic #5- True for Just One?
  586. Equation Discovery
  587. Equivalent Dice
  588. Error Throwing - Error Handling #2
  589. ES2015: Get the real length of string. 
  590. ES6 string addition
  591. Escape the maze
  592. Esolang Interpreters #1 - Introduction to Esolangs and My First Interpreter (MiniStringFuck)
  593. Especially Joyful Numbers
  594. esrever esreveR!
  595. Euclidean distance in n dimensions
  596. Evaluate a postfix expression
  597. Even Binary Sorting
  598. Even numbers in an array
  599. Even odd disparity
  600. Even Odd Pattern #1
  601. Every archer has its arrows
  602. Every possible sum of two digits
  603. Everything Is Even
  604. Evil Autocorrect Prank
  605. Excel sheet column numbers
  606. Exclamation marks series #4: Remove all exclamation marks from sentence but ensure a exclamation mark at the end of string
  607. Exclusive "or" (xor) Logical Operator
  608. Exclusive presentations
  609. Expression Transpiler
  610. Expressive Objects
  611. Extended weekends
  612. Extended Weekends - Challenge Edition
  613. Extending JavaScript Objects: Contains Method
  614. Extending JavaScript Objects: Get First & Last Array Element
  615. Extending JavaScript Objects: Reverse String
  616. Extending JavaScript Objects: Simple Math Methods
  617. Extra Perfect Numbers (Special Numbers Series #7)
  618. extract file name
  619. Extract the IDs from the data set
  620. Fabergé Easter Eggs crush test
  621. Fac Recursion (Pest control - find the bugs and fix them)
  622. Factorial
  623. Factorial length
  624. Factory Functions #1 - Creating profile for people
  625. Factory Functions #2 - Inheritance and Object Composition
  626. Failed Filter - Bug Fixing #3
  627. Failed Sort - Bug Fixing #4
  628. Fake website #1: Choose a good name for the website
  629. Fake website #2: Choose a best server to create website
  630. Fake website #3: Choose a cool color for the web site
  631. Fake website #4: Design a strict user registration verification function
  632. Fake website #6: Design an automatic beta katas processing function
  633. Fame Of All
  634. Fast/Precise Natural Logarithm
  635. Fastest Code : A*B=C
  636. Fastest Code : Count animals
  637. Fastest Code : Equal to 24
  638. Fastest Code : Excel Puzzle #2
  639. Fastest Code : Half it III
  640. Fastest Code : Half it IV
  641. Faulty Data Recovery
  642. Feed Kahumolings!
  643. Feynman's square question
  644. Fibo akin
  645. Fibonacci Generator
  646. Fibonacci on roids
  647. Fibonacci, Tribonacci and friends
  648. Fifa 17 Launch
  649. Figure Out the Notes
  650. File Finder
  651. File Size Trouble!
  652. Fill in the gaps in my timesheet.
  653. Filling an array (part 1)
  654. Filling an array (part 2)
  655. Filter out for good!
  656. Filter valid romans
  657. Financing Plan on Planet XY140Z-n
  658. Find Cracker.
  659. Find a Bunch of Common Elements of Two Lists in a Certain Range
  660. Find a Very Special Set Of Numbers In a Certain Range
  661. Find All Array Values That Fall Within a Given Difference
  662. Find all non-consecutive numbers
  663. Find all occurrences of an element in an array
  664. Find an area
  665. Find array
  666. Find Factors Down to Limit
  667. Find Fibonacci last digit
  668. Find Grid Position
  669. Find heavy ball - level: conqueror
  670. Find heavy ball - level: master
  671. Find heavy ball - level: novice
  672. Find heavy ball - level: ubermaster
  673. Find last Fibonacci digit [hardcore version]
  674. Find me the names
  675. Find min and max
  676. Find Multiples of a Number
  677. Find Nearest square number
  678. Find number in an array # 2
  679. Find number in an array # 3
  680. Find number in an array # 4
  681. Find number in an array # 5
  682. Find number in an array # 6
  683. Find Number With Maximum Number Of Divisors
  684. Find Numbers with Same Amount of Divisors
  685. Find out the longest string chain
  686. Find out whether the shape is a cube
  687. Find sum of top-left to bottom-right diagonals
  688. Find the area of the rectangle!
  689. Find the calculation type
  690. Find the Capitals
  691. Find the discounted prices
  692. Find The Duplicated Number in a Consecutive Unsorted List - Tougher Version
  693. Find the force of gravity between two objects
  694. Find the Golden Ticket!
  695. Find the hobbits!
  696. Find the Integral
  697. Find the Location for the Wildlife Study
  698. Find the longest gap!
  699. Find The Max Sum Of Contiguous-Submatrix In a Matrix - Ultimate Version
  700. Find the Middle of the Product
  701. Find the Mine!
  702. Find the missing element between two arrays
  703. Find the missing term in a Geometric Progression
  704. Find the missing term in an Arithmetic Progression
  705. Find the Most Probable Sum Value or Values, in Rolling N-dice of n Sides
  706. Find the motif in DNA sequence.
  707. Find the Nexus of the Codewars Universe
  708. Find the Nth longest string in an Array
  709. Find the odd int
  710. Find The Parity Outlier redux
  711. Find the position!
  712. Find the smallest
  713. Find the sum of the roots of a quadratic equation
  714. Find the Word Pair!
  715. Find Transcription Factors
  716. Find whether there is a route between two nodes in a graph
  717. Find within array
  718. Find X
  719. Finding North
  720. Finding Remainder Without Using '%' Operator
  721. Finding the Closest Maximum Values of a Function to an Upper Limit
  722. Finish this Mini Sudoku
  723. First n Prime Numbers
  724. First-Class Function Factory
  725. Fix arithmetic progression
  726. Fix array sequence
  727. Fix string case
  728. Fix your code before the garden dies!
  729. Fixed length palindromes
  730. FIXME: Get Full Name
  731. Fizz Buzz - Without ifs
  732. Fizz Buzz Reloaded
  733. FizzBuzz Backwards
  734. Flexible Card Game
  735. Flight incident probabilities
  736. Floating-point Approximation (II)
  737. FloatStream
  738. Fly as fast as you can
  739. Follow that Spy
  740. Following Sierpinski's Footprints
  741. Following the Paths of Numbers Through Prime Factorization
  742. Food combinations
  743. For the sake of argument
  744. For Twins: 1. Types
  745. For UFC Fans (Total Beginners): Conor McGregor vs George Saint Pierre
  746. Format data value
  747. Format Text
  748. Forming a Magic Square
  749. Four Pass Transport
  750. Foxes and rabbits
  751. Free pizza
  752. Frequency Analysis With Buckets
  753. Freudian translator
  754. Friday the 13th Part 1
  755. Frugal Pizza
  756. Fruit Machine
  757. Fruit string calculator
  758. Fuel economy converter (mpg <-> L/100 km)
  759. Fuel usage reporting
  760. Fun with ES6 Classes #1 - People, people, people
  761. Fun with ES6 Classes #2 - Animals and Inheritance
  762. Fun with ES6 Classes #3 - Cuboids, Cubes and Getters
  763. Fun with ES6 Classes #4 - Cubes and Setters
  764. Function Cache
  765. Function Wrappers: Inline Testing
  766. Function Wrappers: pool
  767. Function.prototype.clone
  768. Functional Addition
  769. Functional Binary Trees
  770. Functional Lists
  771. Functions of Integers on Cartesian Plane
  772. functions waterfall!
  773. Funny jubilees
  774. Future
  775. Game Hit the target - 2nd part
  776. Gaussian primes
  777. Generate a random number (the hard way!)
  778. Generate An Array of Unique Strings
  779. Generate range of integers
  780. Generate user links
  781. Generating Generators - Generators #3
  782. Generic Ball Clock
  783. Genetic Algorithm Series - #1 Generate
  784. Genetic Algorithm Series - #3 Crossover
  785. Geohashing
  786. Geometric Mean I
  787. Geometric Progression Sequence
  788. Geometry Basics: Circle Area in 2D
  789. Geometry Basics: Distance between circles in 2D
  790. Geometry Basics: Distance between points in 3D
  791. Geometry Basics: Triangle Area in 2D
  792. Geometry Basics: Triangle Perimeter in 2D
  793. Gerrymander Solver
  794. Get all array elements except those with specified indexes
  795. Get angle between hour and minute hands
  796. Get array elements with specified keys
  797. get ascii value of character
  798. get character from ASCII Value
  799. Get Password from grid
  800. Get root property name
  801. Get Smallest Common Factor
  802. Get the Excel column title!
  803. Get the Grid Coordinates
  804. Get your steppin' on son
  805. Get Zodiac Sign
  806. Getting along with Bernoulli's numbers
  807. Give me a Diamond
  808. Give me DST !!!
  809. Give me the k first digits. Odd digits.
  810. Global estimates
  811. Goldbach’s Conjecture
  812. Gotta start somewhere - Code Tracker #1
  813. GPS Navigation
  814. Grandpa's pants
  815. Graphics Series #1: barcode EAN-13 part1
  816. Graphics Series #2: barcode EAN-13 part2
  817. Graphics Series #3: Repair the LED display
  818. Graphics Series #4: Fireworks
  819. Graphics Series #5: The rope is burning
  820. Graphics Series #6: Traffic lights check
  821. Grasshopper - Function syntax debugging
  822. Grasshopper - Object syntax debug
  823. Grasshopper - Terminal Game #1
  824. Greatest Common Factor of an Array
  825. Greatest Difference
  826. Green Glass Roof- Puzzles #6
  827. Grocer Grouping
  828. Group Repeating Fractions
  829. Gryffindor vs Slytherin Quidditch Game
  830. Guess the array
  831. Guess the list pattern #2
  832. Guess the number!
  833. Hack My Account!
  834. Hacker's job
  835. Haiku Wizard
  836. Half Life
  837. Hall Of Fame
  838. Hamming(7,4) code - Message encoding
  839. Hamster me
  840. Handy Toolbox for Kata authors
  841. Hangman
  842. Hangman game
  843. Hangŭl Unicode From Jamo Values
  844. Hannah vs. Snooze Button
  845. Happy New Year, 2018 !!
  846. Happy numbers
  847. Happy numbers to the n power
  848. Hard Time Bomb
  849. Harry and the Mathematician's Chicken
  850. Haskell scanl function
  851. heggeleggleggo
  852. Hello Happy Codevarrior!
  853. Help Mrs Jefferson
  854. Help Green Lantern with his web site
  855. Help Kiyo きよ solve her problems LCM Fun!
  856. Help Mr. E
  857. Help Mr... Dr. Strange to bargain!
  858. Help Suzuki pack his coal basket!
  859. Help Suzuki purchase his Tofu!
  860. Help the general decode secret enemy messages.
  861. Help your fellow warrior!
  862. Help Yumi collect all the rings. Part 1
  863. Heroes of Might & Magic II: One-on-One
  864. Heroes of Might & Magic II: Chain Lightning
  865. Hex class
  866. Hex to base64
  867. Hex Word Sum
  868. hidden key
  869. Hide from the Sun
  870. Hide password from jdbc url
  871. Hide phone numbers
  872. Highest number with two prime factors
  873. Hit Count
  874. Hofstadter Q
  875. Hold'em Holecard Combinatorics
  876. Holiday IV - Leg Room
  877. Holiday VI - Shark Pontoon
  878. Holiday X - Bintang Vests
  879. Hollow Triangle
  880. Homogenous arrays
  881. Horror Top Trumps (card game)
  882. House of cards
  883. How deep do these trees even go?
  884. How far can you pedal a bike???
  885. How Green Is My Valley?
  886. How long should you cook this for?
  887. How long will it take the train to reach its final destination?
  888. How low do you go?
  889. How many consecutive numbers are needed?
  890. How many cows do you have?
  891. How Many Differences of Squares?
  892. How many dots are covered
  893. How many eggs?
  894. How many feelings?
  895. How many numbers III?
  896. How Many Numbers?
  897. How Many Numbers? II
  898. How many palindromes can you find ? (performance)
  899. How many times should I go?
  900. How much coffee do you need?
  901. How much Wood?
  902. How old will I be in 2099?
  903. HTML DOM: Part 1 - Tree
  904. HTML DOM: Part 2 - Attributes
  905. Human Friendly Random Numbers
  906. Human readable duration format
  907. Human readable working hours
  908. Hungarian Vowel Harmony (harder)
  909. I guess this is a 6kyu kata #10: Emotion of sentences
  910. I guess this is a 6kyu kata #2: Merge strings
  911. I guess this is a 6kyu kata #3: Trim the Christmas tree
  912. I guess this is a 6kyu kata #5: Whac-A-Mole
  913. I guess this is a 7kyu kata #1: Search result
  914. I guess this is a 7kyu kata #4: Find 0 and 1
  915. I guess this is a 7kyu kata #6: Fruit Ninja I
  916. I love big nums and I cannot lie
  917. I need a lookup quick!
  918. I need more speed!
  919. I Promise Not To Optimize
  920. I Spy
  921. I'm already Tracer
  922. I'm longer than you!
  923. Ideal electron distribution
  924. Identify the array's ordering
  925. Image Files Only
  926. Image Processing
  927. Imaginary Base Conversion
  928. Imperfect Fibonacci Rabbits
  929. Imperfect Network #1 (duplicate messages)
  930. Imperfect Network #2 (out-of-order messages)
  931. Implement "The Match" to assign med school graduates to hospitals
  932. Implement brute force protection
  933. Implement Debounce
  934. Implementing a Queue
  935. Implementing a Queue - Performance Version
  936. Implied Probability from Fractional Betting Odds
  937. Indexed capitalization
  938. Infinite Diceworks: MeanMaxing your rolls
  939. Infinite Diceworks: MeanMaxing your rolls (Quantum Mechanically)
  940. Infinite Sequences
  941. Ins and Outs--Play game Series #6:
  942. Insane Coloured Triangles
  943. Insane Permutation Promenade (from AoC 2017 Day 16)
  944. Insert Dashes 2
  945. Insert into xml object - xml #3
  946. Insert value into an array
  947. Inserting multiple strings into another string
  948. Inspiring Strings
  949. Instant Runoff Voting
  950. Integer depth
  951. Integer reduction
  952. Integer to Musical Pitch Classes
  953. Integer triangles
  954. Integer Triangles Having One Angle The Double of Another One
  955. Integer with the longest Collatz sequence
  956. Integers Sum Square
  957. Interactive Dictionary
  958. Interesting Pyramid
  959. Interlaced Spiral Cipher
  960. Invalid Input - Error Handling #1
  961. IP Validation
  962. IPv6 address validation and contraction
  963. IPv6 validator
  964. Is a Prime?
  965. Is Divisible By 6 Mk II
  966. Is Integer Array?
  967. Is It In?
  968. Is n divisible by (...)?
  969. Is there a sequence re-occuring in the list
  970. Is there an arrow missing ? (Relations - Part1: Reflexivity)
  971. Is this working?
  972. Is Undefined?
  973. Is your period late?
  974. isAN(value)
  975. isInt32(int, byteLength)
  976. ISRC - Significant Figures
  977. isReallyNaN
  978. It's Full of Stars
  979. Iterative Rotation Cipher
  980. Japanese Romaji-to-Hiragana Converter
  981. Java format Unicode encoder/decoder
  982. JavaScript class-like objects
  983. Javascript filter - 1
  984. Javascript filter - 2
  985. Javascript filter - 3
  986. Javascript from the Inside #1 : Map
  987. Javascript from the Inside #2: Filter
  988. Javascript Mathematician
  989. JavaScript seems to be broken
  990. Jewel Thief
  991. John and Ann sign up for Codewars
  992. Join command (simplified)
  993. Jokes you've been 'awaiting' for ... promise
  994. Josephus Permutation
  995. Josephus Survivor
  996. JS Golfing #1: undefined
  997. JS Golfing #2: Math.floor
  998. JS Golfing #3: Math.round
  999. JS Golfing #4: Math.random
  1000. JS Golfing #5: A Million Times
  1001. JS Golfing #6: String Summation
  1002. JS Golfing #7: Join
  1003. JS Golfing #8: Is it Uppercase?
  1004. JSON Account Updater
  1005. JSON Parser
  1006. Jumble words
  1007. Jump!
  1008. Jumping Kangaroos
  1009. Jumping Number (Special Numbers Series #4)
  1010. Jurassic Word
  1011. Just Adding and Multiplying
  1012. Kama Sutra Cipher Helper
  1013. Kaprekar Split
  1014. Kaprekar's Routine
  1015. Karnaugh's detonating timer (a k-map primer)
  1016. Kata Impossible I - The Impossible Lottery
  1017. Kebabize
  1018. Keypad horror
  1019. Keys, their drawings and ancient symbols
  1020. Keyword Cipher Helper
  1021. Kids and candies
  1022. KISS - Keep It Simple Stupid
  1023. Knapsack Part 1 - The Greedy Solution
  1024. Kushim the Accountant: Extract $ values from text
  1025. L1: Bartender, drinks!
  1026. Large Factorials
  1027. Larger Product or Sum
  1028. Largest Cross Sum
  1029. Largest Elements
  1030. Largest Palindromic Product
  1031. Largest product in a series
  1032. Last
  1033. Last and rich in circle
  1034. Last Digit of an Array
  1035. Last digit of a huge number
  1036. Last digit symmetry
  1037. Lat/Long Parser
  1038. Laxative Shot Roulette
  1039. Lazy Chain
  1040. Lazy evaluation
  1041. Left$ and Right$
  1042. Let's Play Darts!
  1043. Lexicographic Permutations
  1044. Life without primes
  1045. Limit string length - 1
  1046. Line Segments Intersection Point
  1047. Line, Normalization
  1048. Linear Equation Solver
  1049. Linear Regression of Y on X
  1050. Link Up--Play game Series #7
  1051. Linux history and ! command. Series#1 The !! command
  1052. Linux history and ! command. Series#2 The !n command
  1053. Linux history and ! command. Series#3 The !-n command
  1054. Linux history and ! command. Series#4 The !string command
  1055. Linux history and ! command. Series#5 The !?string command
  1056. List Comprehensions
  1057. Lists and Objects - Top Trump Optimizer
  1058. Live and Let Dice ...roll
  1059. Live Chess Ratings
  1060. Localize The Barycenter of a Triangle
  1061. Logic Calculator - Puzzles #3
  1062. Logical Disjunctions
  1063. Logistic Map
  1064. Long Division
  1065. Longest Consecutive Sequence of Squares
  1066. Longest palindrome
  1067. Longest Word in Dictionary
  1068. Loose Change
  1069. Loose Change!
  1070. Lost number in number sequence
  1071. Lottery machine
  1072. Lottery Ticket
  1073. Lowercase strings in array
  1074. Lowest product of 4 consecutive numbers
  1075. LRU Cache
  1076. Lucas numbers
  1077. Lucas-Lehmer Test for Mersenne Primes
  1078. Lucky Sevens
  1079. Lychrel numbers
  1080. LZW Compression - Squeeze that data!
  1081. LZW Compression (and decompression)
  1082. Mad Max: Recursion Road
  1083. Madhav array
  1084. Magic Square Validator
  1085. Magic The Gathering #2: Mana
  1086. Magic The Gathering #3: Spell Stack
  1087. Mahjong - #2 Seven-pairs
  1088. Mahjong - #3 How far from winning
  1089. Mahjong - #4 Play with imagination!
  1090. Mahjong winning hand Validation #1: DA SI XI(大四喜)
  1091. Mahjong winning hand Validation #2: DA SAN YUAN(大三元)
  1092. Mahjong winning hand Validation #4: JIU LIAN BAO DENG(九莲宝灯)
  1093. Mahjong winning hand Validation #5: YI SE SI BU GAO(一色四步高)
  1094. Make a 1 to n sequence
  1095. Make a Palindrome
  1096. Make a square box!
  1097. Make Object Into Iterable Array
  1098. Make the Deadfish Swim
  1099. Make the small words big!
  1100. Making Change
  1101. Making Change: Part 2
  1102. Making Copies
  1103. Making squares with lines
  1104. Man in the west
  1105. Manage the Robot Factory: Day 1
  1106. Manipulate URL Parameters
  1107. Many Maps As One
  1108. Map and Filter to Get a Special Sequence of Integers
  1109. Map function issue
  1110. Marching armies
  1111. Markings to White Triangles and How to Find Them
  1112. Masquerade Waiting Line
  1113. Master your primes: sieve with memoization
  1114. Math Issues
  1115. Math Object Madness
  1116. Matrix creation
  1117. Matrix Multiplier
  1118. Matrix Rotation
  1119. Matrix Square Up, B!
  1120. Max number of people and year in a specific place
  1121. Max-min arrays
  1122. Maxed Out
  1123. Maximum Product of Parts
  1124. Maximum Product
  1125. Maya Number Converter
  1126. Memesorting
  1127. Memoized Log Cutting
  1128. Memory Reallocation
  1129. Merge two arrays
  1130. MergeSort "merge" function
  1131. Message from Aliens
  1132. Meta-Kata: Duplicate Detector v0.1
  1133. Metaprogramming: Lisp-style Generic Functions
  1134. Mid-Endian numbers
  1135. Midpoint inception
  1136. Midtown Navigator
  1137. Miles per gallon to kilometers per liter
  1138. Milliseconds
  1139. Min or Max of . . .
  1140. Mind the Gap
  1141. Mine Sweeper
  1142. Minimum dollar bill's count
  1143. Minimum Number of Coins
  1144. Minimum path in squares
  1145. Minimum Reduction
  1146. Minimum Steps (Array Series #6)
  1147. Minimum unfairness of a list/array
  1148. Miracle Sort
  1149. Missing Alphabet
  1150. Missing Angle
  1151. Missing number in Unordered Arithmetic Progression
  1152. Mission: Hidden Message
  1153. Mixbonacci
  1154. mkdir -p
  1155. Mnemo Passwords : pwgen
  1156. Mnemonic Lookup
  1157. Modulo operations of big Numbers
  1158. Monads: The Maybe Monad
  1159. Monads: The list monad
  1160. Money Match: Double or Nothing
  1161. Mongodb ObjectID
  1162. Monkey Talk
  1163. Monkey Tennis - The Aftermath
  1164. Monkey's MATH 01: How many "ZERO"s?
  1165. MONTE CARLO 3D
  1166. month name story
  1167. Months, Weeks, Days, Hours and Minutes
  1168. Most Consecutive Zeros of a Binary Number
  1169. Most frequently used words in a text
  1170. Mount Events in ReactJS
  1171. Moves in squared strings (I)
  1172. Moves in squared strings (II)
  1173. Moves in squared strings (III)
  1174. Moves in squared strings (IV)
  1175. MTV Cribs
  1176. Multi Line Task: Fizz Buzz
  1177. Multi Line Task: GCD Function
  1178. Multi Line Task++: Hello World
  1179. Multi Line Task∞: Hello World
  1180. Multiple implications
  1181. Multiple remainder of the division
  1182. Multiples by permutations
  1183. Multiples By Permutations II
  1184. Multiples of 3 and 5 redux
  1185. Multiplication - Generators #2
  1186. Multiplicative Persistence... What's special about 277777788888899?
  1187. Multiply list by integer (with restrictions)
  1188. Multiply the number
  1189. Multiply Word in String
  1190. multiply(value, times)
  1191. Mutate My Strings
  1192. Mutual Recursion
  1193. myjinxin katas #001 : Rotate, Remove, Return
  1194. myjinxin katas #002 : Hotel room number
  1195. myjinxin katas #003 : Crossword puzzle
  1196. myjinxin katas #004 : Soldier's queue training(easy version)
  1197. myjinxin katas #005 : Age Of Wind
  1198. myjinxin's Fairy tales #001 : Aladdin's lamp and three wishes
  1199. myjinxin's Fairy tales #002 : Ali Baba and the Forty Thieves I
  1200. myjinxin's Fairy tales #003 : Ali Baba and the Forty Thieves II
  1201. myjinxin's Fairy tales #004 : Ali Baba and the Forty Thieves III
  1202. myjinxin's Fairy tales #005 : The little match girl
  1203. Mystery Function
  1204. Mystery function #1
  1205. Mystery function #2
  1206. N High Scores
  1207. N smallest elements in original order
  1208. n-Bonacci Ratio
  1209. N-centered Array
  1210. N-Parasitic Numbers Ending in N
  1211. N00bify - English to n00b Translator
  1212. Name Array Capping
  1213. Name on billboard
  1214. Name That Integer
  1215. Name to Matrix
  1216. Natas Recipes
  1217. NATO Phonetic Alphabet
  1218. Natural Log Approximator
  1219. Naughty or Nice?
  1220. Needles in a haystack
  1221. Negation of a Value
  1222. Nesting Structure Comparison
  1223. new Deck() of Cards
  1224. new IntStorage(byteLength, ints).read(from, count);
  1225. new IntStorage(byteLength).write(value, length)
  1226. new with apply
  1227. Next Featured Number Higher than a Given Value
  1228. Next Largest Value (by rearranging the last digit and the last by one if neccessary)
  1229. Next Palindromic Number.
  1230. Next smaller number with the same digits
  1231. Nickname Generator
  1232. NIM the game
  1233. Ninety Nine Thousand Nine Hundred Ninety Nine
  1234. Ninja vs Samurai: Strike
  1235. No Loops 1 - Small enough?
  1236. No Loops 2 - You only need one
  1237. No Return #2: Test the Devices
  1238. No Return #3: Solve the Equation
  1239. Node.js Async I/O
  1240. Non Decomposable Primes as Sums of Perfect Squares
  1241. Non-even substrings
  1242. None shall pass
  1243. noobCode 03: CHECK THESE LETTERS... see if letters in "String 2" are present in "String 1"
  1244. noobCode 04: HOT SINGLES...compare two arrays, return the unpaired items !
  1245. Normal number
  1246. Normalizing Out of Range Array Indexes
  1247. Not all but sometimes all
  1248. Not prime numbers
  1249. Not Quine
  1250. Not so black box
  1251. Not that obvious summation
  1252. Not very secure
  1253. Now that's a crib!
  1254. Noye's Fludde
  1255. NSA Phone Tapping
  1256. NSA's Little Puzzle
  1257. nth Floyd line
  1258. Nth Smallest Element (Array Series #4)
  1259. Nth term - Linear Sequences
  1260. Nuclear Missile Manager
  1261. Number , number ... wait LETTER !
  1262. Number climber
  1263. Number Decoding
  1264. Number Manipulation I (Easy)
  1265. Number of anagrams in an array of words
  1266. Number of Folds
  1267. Number of measurements to spot the counterfeit coin
  1268. Number of Palindromic Substrings
  1269. Number of Proper Fractions with Denominator d
  1270. Number Shortening Filter
  1271. number with 3 roots.
  1272. Number-like counter
  1273. Number-Star ladder
  1274. Number.prototype.toDecimal
  1275. Numbers and its Reversal Having Same Prime Factors.
  1276. Numbers in different systems
  1277. Numbers in strings
  1278. Numbers that are a power of their sum of digits
  1279. Numbers Which Sum of Powers of Its Digits Is The Same Number
  1280. Numbers' Plus Pattern
  1281. Numerical Palindrome #2
  1282. Numerical Palindrome #3
  1283. Numerical Palindrome #3.5
  1284. Numerical Palindrome #4
  1285. Numerology
  1286. NxN Connect X
  1287. Obfuscation confusion - Bug Fixing #10
  1288. Object to Array
  1289. object to xml - xml #2
  1290. Objectify all the strings
  1291. Odd Not Prime
  1292. Odd-heavy Array
  1293. Odds-Index
  1294. Offload your work!
  1295. Offspring Traits
  1296. Oh come on! Hello world! once again?
  1297. Oh dear God! Is it bugged?
  1298. Oktober Fest: Bjorg's Got A Drinking Problem
  1299. Old Greg's Binary Fingers
  1300. Once
  1301. One down
  1302. One graph or multiple ones ?
  1303. One Line : Bit Calculator
  1304. One line kata: Sum Multiples of 3 and 5
  1305. One Line Task: 'for' fun
  1306. One Line Task: Diamond Creator Pro
  1307. One Line Task: Making Pizza
  1308. One line task: Multiples of 3 and 5
  1309. One Line Task: Paint The Walls Of Office
  1310. One line task: Square a number Without *, + or Math.pow()
  1311. One line task: Square Every Digit
  1312. One Line Task: String Isomorphism
  1313. One Line Task: The Special Downward Step
  1314. One Line Wonder: Sum All Even Fibonacci Numbers
  1315. One Line: Even Check
  1316. One Variable Second Degree Equation Solver
  1317. Ones' Complement
  1318. Onion array
  1319. Ookkk, Ok, O? Ook, Ok, Ooo!
  1320. Operation - Steal the Election!
  1321. Optimum coding school location
  1322. Oracle: Coin Method
  1323. Ordinal Numbers
  1324. Ore Numbers
  1325. Organise duplicate numbers in list
  1326. ORing arrays
  1327. Orthogonal Vectors
  1328. Pack the box.
  1329. PaginationHelper
  1330. Palindrome for your Dome
  1331. Palindrome integer composition
  1332. Palindromes with a slight twist: vowels & consonants assessed separately
  1333. Palindromic Mnemonics
  1334. Paragraph Setting: Align Left
  1335. Parallel resistors
  1336. Parity bit - Error detecting code
  1337. Parse a linked list from a string
  1338. Parse all my XML please - Angular #1
  1339. Parse HTML/CSS Colors
  1340. Parse this function! - Puzzles #7
  1341. Parsing musical notes into MIDI
  1342. Partial Word Searching
  1343. Partially equal objects
  1344. Partition On
  1345. Path Finder #2: shortest path
  1346. Path Finder #3: the Alpinist
  1347. Path Finder #4: where are you?
  1348. Path Finder #5: there's someone here
  1349. Paths in the Grid
  1350. Paul Cipher & Kevin Arnold
  1351. PC upgrade specs using HOC in ReactJS
  1352. Peak array index
  1353. Peel the Pairs
  1354. Pentabonacci
  1355. Percentage of amino acids
  1356. Perfect Square.
  1357. Permutation position
  1358. Permutation Average
  1359. Permutation by number
  1360. Permutational Primes
  1361. Permutations - Generators #4
  1362. Permutations Of An Array And Associated Values
  1363. Permute a Palindrome
  1364. Personalising Spammy Marketing Emails
  1365. Personalized brand list
  1366. Physics - Mechanics - Atwood Machines in Series
  1367. Piano Kata, Part 1
  1368. Piano Kata, Part 2
  1369. pick a set of first elements
  1370. Pig Sursurunga
  1371. Pillow on the Fridge
  1372. Ping-Pong service problem
  1373. Pinocchio's polygraph.
  1374. Pitches and Notes
  1375. Pizza Payments
  1376. Plants and Zombies
  1377. Play FlappyBird : Advance Bravely
  1378. Play PacMan : Devour all
  1379. Play PingPong : Precise control
  1380. Play Tetris : Shape anastomosis
  1381. Player Contact Manager
  1382. Player Methods - Dungeon crawler #2
  1383. Playing with Sets : Complement
  1384. Playing with Sets : Equal or Not ?
  1385. Playing with Sets : Intersection
  1386. Playing with Sets : Sup/Sub
  1387. Playing with types
  1388. Plenty of Fish in the Pond
  1389. Plus - minus - plus - plus - ... - Count
  1390. Plus - minus - plus - plus - ... - Sum
  1391. Podcast Speed Listening Calculator
  1392. Pokemon Go
  1393. Pokemon Go - Extended Edition
  1394. PokerHelper lvl. 1
  1395. Pole Vault Starting Marks
  1396. Polish alphabet
  1397. Polygon Orientation
  1398. Poor man's spreadsheet API
  1399. Portion of Array
  1400. Possibilities of throwing a coin n times
  1401. Possible Triangles Formed with Available Iron Rods
  1402. Potenciation
  1403. Potion Class 101
  1404. Power
  1405. Power .bind()
  1406. Power 2
  1407. Power Laws
  1408. Powers of 3
  1409. Powers of i
  1410. Practical Interview Prep: Binary Search Tree .push()
  1411. Pre-FizzBuzz Workout #1
  1412. Prefix Permutation
  1413. Presentation order
  1414. Preserve the order !
  1415. Pretty date
  1416. Price is right
  1417. Price of Mangoes
  1418. Prime reduction
  1419. Prime reversion
  1420. Prime Word
  1421. Primes in numbers
  1422. Primitive Pythagorean Triples
  1423. Primorial Of a Number
  1424. Print a Rectangle Using Asterisks
  1425. Print count and numbers
  1426. Print number with character
  1427. PRNG: Linear Congruential Generator
  1428. Process Waterfowl Survey Data Results
  1429. Product ID from URL
  1430. Product of Adjacent Grid Numbers
  1431. Product of consecutive Fib numbers
  1432. Product Of Maximums Of Array (Array Series #2)
  1433. Product of the main diagonal of a square matrix.
  1434. Product-Sum Numbers
  1435. Program a Calculator #1 - Points in 3D Space
  1436. Program a Calculator #2 - 3D Vectors
  1437. Progressive Spiral Number Branch
  1438. Progressive Spiral Number Distance
  1439. Progressive Spiral Number Position
  1440. Promises Made and Broken: The Misadventures of Bob the Highly Paid Consultant
  1441. Protein Synthesis: From DNA to Polypeptide
  1442. Puzzle Fighter
  1443. Pythagorean Triplets
  1444. PythonSlice
  1445. Quadratic Enumerator
  1446. Quantum Bogosort
  1447. Quartile methods
  1448. Queue Battle
  1449. Queue time counter
  1450. Quick (n choose k) calculator
  1451. Quicksum
  1452. Quidditch Scoreboard
  1453. Quipu Calculator
  1454. Random case
  1455. Randomize Objects
  1456. Range function
  1457. Range of Integers in an Unsorted String
  1458. Ranking Appointments
  1459. Ranking System
  1460. Rap-Name Generator
  1461. Ratio of Bouncy Numbers
  1462. Reach Me and Sum my Digits
  1463. React Fun #1: Component types and nesting
  1464. React with JSX
  1465. Read the time
  1466. Readability is King
  1467. Readable developer-friendly large numbers
  1468. Really Complex Sum
  1469. Recurrence by Recursion
  1470. Recursion 101
  1471. Recursion #1 - Factorial
  1472. Recursion #2 - Fibonacci
  1473. Recursion: An introduction
  1474. Recursive Averages
  1475. Recursive Floor Sequence
  1476. Recursive Ninja
  1477. Recursive Ninja: Warlords edition
  1478. Reducing Problems - Bug Fixing #8
  1479. Refactored Greeting
  1480. Regular Expression for Binary Numbers Divisible by n
  1481. Reimplement Multiplication Part 1
  1482. Relatively Prime Numbers
  1483. Remember
  1484. Remove a Specific Element of an Array
  1485. Remove All The Marked Elements of a List
  1486. Remove duplication
  1487. Remove First and Last Character Part Two
  1488. Remove Zeros
  1489. ReOrdering
  1490. Replace Noun Phrases with Pronouns
  1491. Represent array of numbers as ranges
  1492. Retrieve Ether Balance
  1493. Return a sorted list of objects
  1494. Return Specifics from an Object.
  1495. Return String of First Characters
  1496. Return the first M multiples of N
  1497. Return TIMESTAMP from date
  1498. Reverse a Number
  1499. Reverse DNS delegation (RFC4183)
  1500. Reverse every other word in the string
  1501. Reversed Message
  1502. reverseIt
  1503. Reverser
  1504. Reversi row rudiments
  1505. Rithm Series: Frame a Phrase Simple
  1506. Roasting Chicken
  1507. Robbing Rövarspråket
  1508. RoboScript #5 - The Final Obstacle (Implement RSU)
  1509. Robotic Tattoo Removal
  1510. Rock Paper Scissors Oracle
  1511. Roman numerals converter and validator
  1512. Romanize Russian Road Signs
  1513. ROT13 variant cipher
  1514. Rotate Array (JS)
  1515. Rotate Corners
  1516. Rotate matrix counter - clockwise N - times!
  1517. Rotated string
  1518. Rotation Cipher Cracker
  1519. Round by 0.5 steps
  1520. Round to nearest 0 or 5
  1521. Route Calculator
  1522. Routes in a square grid
  1523. Running out of space
  1524. RuplesJS #1: N Times Do
  1525. RuplesJS #2: String Delete
  1526. RuplesJS #3: String EachChar
  1527. RuplesJS #4: String Formatting
  1528. RuplesJS #5: Range
  1529. Russian plurals
  1530. Russian postal code checker
  1531. Saint Petersburg Paradox Model
  1532. Same Birthday Probability
  1533. Santa wish list form in ReactJS
  1534. SantaClausable Interface
  1535. Satisfying numbers
  1536. Save Private Brain
  1537. Scaling Squared Strings
  1538. Scheduling (Round-Robin)
  1539. Scheduling (Shortest Job First or SJF)
  1540. Schrödinger's Boolean
  1541. Scooby Doo Puzzle
  1542. Scrambled Numbers Sorting
  1543. Scraping: Codewars Top 500 Users
  1544. Screen Locking Patterns
  1545. Scrolling Text
  1546. Search and sort names
  1547. search in multidimensional array
  1548. Seating arrangement at a Polyglot Summit
  1549. Secret Agent 101: The secret password
  1550. Secret knock
  1551. Secret Message
  1552. Secret Reverse Language Converter
  1553. See You Next Happy Year
  1554. Seeing Shows at the Edinburgh Fringe!
  1555. Selective Array Reversing
  1556. Selective fear of numbers
  1557. self_converge
  1558. Semi-Optional
  1559. Sentence Calculator
  1560. Sentences with Functions
  1561. Separate The Wheat From The Chaff
  1562. Separating Strings
  1563. Sequence convergence
  1564. Sequence to 1
  1565. Series Forensics
  1566. Set - the card game
  1567. Seventh JSON of a seventh JSON
  1568. Sexy Primes <3
  1569. Shakespearean Tug of War
  1570. Share prices
  1571. Sharpen up
  1572. Shop Inventory Manager
  1573. Shorten Me: Array Declaration III (Fibonacci Last Digit)
  1574. Shorten Me: Array Declaration IV (1-30)
  1575. Shorten Me: Array Declaration IX (Variable Types)
  1576. Shorten Me: Array Declaration V (Weekday & Weekend)
  1577. Shorten Me: Array Declaration VI (Months)
  1578. Shorten Me: Array Declaration VII (Alphabets)
  1579. Shorten Me: Array Declaration VIII (Musical Scales)
  1580. Shorten Me: Array Declaration X (O-I-II)
  1581. Shorten Me: Array Declaration XI (Triangle)
  1582. Shorten Me: Array Declaration XII (Constants)
  1583. Shorten Me: Mad Mathematician's Algorithm VI (Power)
  1584. shorter concat [reverse longer]
  1585. Shortest Code : Are they symmetrical?
  1586. Shortest code : Balance Attraction
  1587. Shortest Code : Eat watermelon
  1588. Shortest Code : Find the murderer
  1589. Shortest Code : Guess the Hat
  1590. Shortest Code : Jumping Dutch act
  1591. Shortest Code : Planting Trees
  1592. Shortest Code : Reading a Book
  1593. Shortest Code : Regular expression compression
  1594. Shortest Code : Remove screws I
  1595. Shortest Code : Special factor
  1596. Shortest code : Tidy up the room
  1597. Shortest Code : Waiting for a Bus
  1598. Shortest code: Bug in Apple
  1599. Shortest Code: Collatz Array(Split or merge)
  1600. Shortest code: Father and Son
  1601. Shortest code: Give me the equation
  1602. Shortest code: Max Value
  1603. Shortest Code: Symmetric Sort
  1604. Shortest Code: Trypophobia
  1605. Shortest code: Virus in Apple
  1606. Shortest Knight Path
  1607. Shortest steps to a number
  1608. Shrink the maze!
  1609. SillyCASE
  1610. Simple division
  1611. Simple arithmetic progression
  1612. Simple array product
  1613. Simple Blackjack
  1614. Simple Change Machine
  1615. Simple Comparison?
  1616. Simple consecutive pairs
  1617. Simple CSS selector comparison
  1618. Simple digit code breaker
  1619. Simple directions reversal
  1620. Simple equation reversal
  1621. Simple Events
  1622. Simple eviternity numbers
  1623. Simple fibonacci strings
  1624. Simple fraction to mixed number converter
  1625. Simple frequency sort
  1626. Simple Fun #364: Not Too Random
  1627. Simple Fun #365: Remove Number Game I
  1628. Simple Fun #377: The Visible Posters II
  1629. Simple Interest and Compound Interest
  1630. Simple letter removal
  1631. Simple Maths Test
  1632. Simple max digit sum
  1633. Simple Memory Manager
  1634. Simple missing sum
  1635. Simple nearest prime
  1636. Simple non-decreasing array
  1637. Simple number sequence
  1638. Simple palindrome game
  1639. Simple parenthesis removal
  1640. Simple Physics Problem
  1641. Simple prime streaming
  1642. Simple repeated words
  1643. Simple reversal game
  1644. Simple reversed parenthesis
  1645. Simple rotated palindromes
  1646. Simple Ruby code formatter
  1647. Simple safecracking
  1648. Simple Simple Simple String Expansion
  1649. Simple string characters
  1650. Simple string division
  1651. Simple string division II
  1652. Simple string expansion
  1653. Simple string indices
  1654. Simple string matching
  1655. Simple string reversal
  1656. Simple string reversal II
  1657. Simple Substitution Cipher Helper
  1658. Simple sum of pairs
  1659. Simple template
  1660. Simple Time Bomb
  1661. Simple time difference
  1662. Simple Web Framework #1: Create a basic router
  1663. simpleLog
  1664. Simplify the number!
  1665. Simplifying multilinear polynomials
  1666. Simulating a Multiserver Queue
  1667. Simultaneous Equations - Three Variables
  1668. Single character palindromes
  1669. Single character palindromes II
  1670. Single-Use Tickets: Don't Let Anyone Sneak In!
  1671. Singleton Pattern
  1672. Sir , showMe yourID
  1673. Slamming Lockers
  1674. sliceBits(int, from, count)
  1675. Sliding Puzzle Solver
  1676. Smallest possible sum
  1677. Smart Sum
  1678. Smart Toaster
  1679. Smith number
  1680. SMS Lottery Bet Validator
  1681. SMS Shortener
  1682. Soccer Fixtures Results Table
  1683. Socialist distribution
  1684. Solomon's Quest for the Temporal Crystal
  1685. Solve For X
  1686. solve from sums
  1687. Solve Rubik 's Cube by repetition
  1688. Solving Quadratics
  1689. Some Circles
  1690. Something 's fishy...
  1691. Sort and Transform
  1692. sort array by last character
  1693. Sort it out!
  1694. Sort rectangles and circles by area
  1695. Sort the climbing grades
  1696. Sort the Gift Code
  1697. Sort the Vowels!
  1698. Sorted list
  1699. Sorting Arrays by the Amount of Perfect Squares that Each Element May Generate
  1700. Sorting the Rabbit Hole
  1701. Sorting Time
  1702. Space Invaders Underdog
  1703. Spanish Conjugator
  1704. Spanish Pirates off the Treasure Coast
  1705. Sparse Ruler
  1706. Sparse array split function
  1707. Special Number (Special Numbers Series #5)
  1708. Special Multiples
  1709. Special Scores For Words
  1710. Speech to Text - String Manipulation
  1711. SpeedCode #1 - Getters and Setters in Object Literals
  1712. SpeedCode #2 - Array Madness
  1713. SpeedCode #3 × Fun with ES6 Classes #5 - Dogs and Classes
  1714. SpeedCode #4 × Factory Functions #3 - Artefacts
  1715. Spider man and his enemy
  1716. Spidey Swings Across Town
  1717. Spinning Rings
  1718. Split an array
  1719. Split and then add both sides of an array together.
  1720. Split In Parts
  1721. Split string for Text-to-Speech API
  1722. Split The Bill
  1723. Sports league table - help your local team!
  1724. Spraying trees
  1725. Spy Function
  1726. Square sums (simple)
  1727. Squarefree Part of a Number
  1728. Squares sequence
  1729. Stack Safe Recursion
  1730. Stargate SG-1: Cute and Fuzzy (Improved version)
  1731. Statistics - Fundamentals
  1732. Statistics for an Athletic Association
  1733. Statistics in Kata 2: AND case - Ball bags
  1734. Steer the Ship
  1735. Steps in k-primes
  1736. Steven's Password Decryption
  1737. Stock Position Size Calculator
  1738. Stone bridge primes
  1739. Stop it, HTML!
  1740. Strange roman numbers
  1741. String array duplicates
  1742. String like [Char]
  1743. String basics
  1744. String Box
  1745. String Breakers
  1746. String character frequency
  1747. String chunks
  1748. String Compression Challenge
  1749. String counting
  1750. String doubles
  1751. String Evaluation
  1752. String formatter
  1753. String Integer Greater-than
  1754. String matchup
  1755. String Merge!
  1756. String reduction
  1757. String Reordering
  1758. String Scramble
  1759. String subpattern recognition I
  1760. String subpattern recognition II
  1761. String subpattern recognition III
  1762. Strings, strings, strings (Easy)
  1763. Strings, strings, strings (Hard)
  1764. Stutter function
  1765. Sub-array division
  1766. Subnet Calculating
  1767. Sum #2
  1768. Sum decomposition
  1769. Sum of (Two) Squares
  1770. Sum of a Sequence [Hard-Core Version]
  1771. Sum of all arguments
  1772. Sum of array singles
  1773. Sum of differences between products and LCMs
  1774. Sum of differences in array
  1775. Sum of integer combinations
  1776. Sum of integers in string
  1777. Sum of prime-indexed elements
  1778. Sum Only Numbers
  1779. Sum The Strings: ARRAY EDITION
  1780. Sum up the random string
  1781. sum2total
  1782. Summarize ranges
  1783. Summy
  1784. Super Class Extensions
  1785. Super Smaaassh Brotheerrrs!
  1786. Superphore Master
  1787. Surface Area and Volume of a Trapezoidal Prism
  1788. Sushi-go-round (Beginner's)
  1789. Swap the head and the tail
  1790. Swap two elements
  1791. Swap two numbers
  1792. Swarm bots - swarm intelligence #1
  1793. Swedish Tipping
  1794. Sweet Dreams are Made of Cheese
  1795. Switch/Case - Bug Fixing #6
  1796. Symbolic differentiation of prefix expressions
  1797. Symbols counted
  1798. Synchonizing records
  1799. T.T.T. #7: Profit or loss
  1800. T.T.T. #8: Reverse all
  1801. T.T.T. #9: Peaks and valleys
  1802. T.T.T.#2: Equal to 24
  1803. T.T.T.#3: Three lifts
  1804. T.T.T.#4: Key of door
  1805. T.T.T.#5: Only you
  1806. T.T.T.#6: nth user
  1807. T.T.T.10: The largest square
  1808. T.T.T.11: Three increasing numbers
  1809. T.T.T.12: Split integer
  1810. T.T.T.13: A game named "Five,Ten,Fifteen,Twenty"
  1811. T.T.T.14: Find the largest "X"
  1812. T.T.T.15: Sort the alarm clock
  1813. T.T.T.16: Warning of Array.map()
  1814. T.T.T.23: Silly birds
  1815. T.T.T.24: Chinese surname (《百家姓》)
  1816. T.T.T.33: Grandfather clock
  1817. T.T.T.38: The sum of each digits
  1818. T.T.T.40: m to n % 9
  1819. T.T.T.41: The maximum profit
  1820. T.T.T.43: The appellation of the Chinese people's age and his zodiac（中国人的年龄和他的生肖称谓）
  1821. T.T.T.58: Simple face recognition system
  1822. T.T.T.59: The language from the distant planet
  1823. T.T.T.60: Break all the rules
  1824. T.T.T.61: Alien's magic
  1825. Tabs to spaces
  1826. Tail Call Optimization
  1827. Take an Arrow to the knee, Functionally
  1828. Take It or Leave It Interview Strategy
  1829. Take the Derivative
  1830. Takeshi's Castle Spy: Knock Knock
  1831. Talisman Board Game Combat System Checker
  1832. Tank coding #1 : simple AIM systems
  1833. Tap Into Mr. Mxyzinjin's Brain
  1834. Tap Into Mr. Mxyzinjin's Matrix
  1835. Tap Into Mr. Mxyzinjin's Safe
  1836. Tap into Mr. Mxyzinjin's Stream
  1837. Tap Into Mr. Mxyzinjin's Toy Safe
  1838. Tap into Reivhax's robot
  1839. Temp Tracker: Max, Min, Mean and Mode
  1840. Template Strings
  1841. Test for semiprime (Mathematics)
  1842. Test Your Knowledge Of Function Scope
  1843. Test's results
  1844. Testing the Porges hypothesis
  1845. Texas Hold'em Hands
  1846. Text editor feature!
  1847. The 'if' function
  1848. The (nearly) Perfect Mirror
  1849. The 196-algorithm and Lychrel numbers
  1850. The answer to life the universe and everything.
  1851. The Answer to the Ultimate Question of Life, The Universe, and Everything
  1852. The Arpeggiator
  1853. The average length
  1854. The Baby Years III - First Tooth
  1855. The boolean order
  1856. The common directory path
  1857. The Coupon Code
  1858. The Cube Structure
  1859. The Deca Tree
  1860. The Desperate Rocket Scientist
  1861. The Enigma Machine - Part 1: The Plugboard
  1862. The fusc function -- Part 1
  1863. The fusc function -- Part 2
  1864. The good old olden early years
  1865. the hidden thief
  1866. The Ice Cream Vendors Dilema
  1867. The Ladies of ENIAC
  1868. The largest "mirror"
  1869. The learning game - Machine Learning #1
  1870. The longest bracket substring in the string
  1871. The map and the keys
  1872. The maximum sum value of ranges -- Ultimate version
  1873. The money in the bank
  1874. The most asked question on CodeWars
  1875. The Most Repeated Letter.
  1876. The Most Sacred of Days
  1877. The observed PIN
  1878. The Office II - Boredom Score
  1879. The old switcheroo
  1880. The old switcheroo 2
  1881. The Overlap Time
  1882. The Owls Are Not What They Seem
  1883. The Power of Exponents
  1884. The Prediction
  1885. The Queen Of Hearts Challenge
  1886. The queen on the chessboard
  1887. The rarest pepe
  1888. The Rhinestone Cowboy ~ Count the dollars in his boots!
  1889. The sortReloaded() method
  1890. The Sum and The Rest of Certain Pairs of Numbers have to be Perfect Squares (more Challenging)
  1891. The Supermarket Queue
  1892. The ugly truth about reduce
  1893. The ugly truth about reduce (ii)
  1894. The ugly truth about reduce (iii)
  1895. The Walker
  1896. The wheat/rice and chessboard problem
  1897. There are two kinds of people
  1898. They say that only the name is long enough to attract attention. They also said that only a simple Kata will have someone to solve it. This is a sadly story #1: Are they opposite?
  1899. Thinkful - Logic Drills: Red and bumpy
  1900. Thinkful - Number Drills: Blue and red marbles
  1901. Thinkful - Object Drills: Vectors
  1902. Thinking & Testing #38: What's the "?"
  1903. Thinking & Testing : Archery contest
  1904. Thinking & Testing : A happy day will come
  1905. Thinking & Testing : Digital swimming pool
  1906. Thinking & Testing : Falsetto Rap Concert
  1907. Thinking & Testing : From nothingness To nothingness
  1908. Thinking & Testing : Hail and Waterfall
  1909. Thinking & Testing : How many "word"?
  1910. Thinking & Testing : How many blocks?
  1911. Thinking & Testing : I hate big and small
  1912. Thinking & Testing : Incomplete string
  1913. Thinking & Testing : Love Forever
  1914. Thinking & Testing : Math of Middle school
  1915. Thinking & Testing : Math of Primary School
  1916. Thinking & Testing : Nebula or Vortex
  1917. Thinking & Testing : Not perfect? Throw away!
  1918. Thinking & Testing : Operator hidden in a string
  1919. Thinking & Testing : Report about something
  1920. Thinking & Testing : Retention and discard
  1921. Thinking & Testing : Retention and discard II
  1922. Thinking & Testing : Safe position
  1923. Thinking & Testing : Something capitalized
  1924. Thinking & Testing : Spatiotemporal index
  1925. Thinking & Testing : Sport Star
  1926. Thinking & Testing : Substring Magic
  1927. Thinking & Testing : Sum of 15(Hetu Luosliu)
  1928. Thinking & Testing : The repair of parchment
  1929. Thinking & Testing : True or False
  1930. Thinking & Testing : Uniq or not Uniq
  1931. Thinking & Testing : Who are you?
  1932. Thinking & Testing : Wind whispers
  1933. Thinking & Testing: A and B?
  1934. This isn't what you think! The Misadventures of Bob the Highly Paid Consultant #2
  1935. THIS n' THAT
  1936. Three added Characters
  1937. Three Dots--Play game Series #8
  1938. Throw from list - Error Handling #3
  1939. Thue-Morse Sequence
  1940. Tic-Tac-Toe Checker
  1941. Tic-Tac-Toe-like table Generator
  1942. Ticker
  1943. Tidy Number (Special Numbers Series #9)
  1944. Time Conversion: 12s and 24s
  1945. Time Converter: hours, minutes, seconds and milliseconds
  1946. Time Degrees
  1947. Time Simulation
  1948. Timers
  1949. To BrainFuck Transpiler
  1950. toHonestlyFixed()
  1951. ToLeetSpeak
  1952. Tom's Allergies
  1953. Tombola - validation
  1954. Total Resistance in a Parallel Circuit
  1955. Touching Rectangles
  1956. Tower Defense: Risk Analysis
  1957. Track the Ball
  1958. Tracking Hits for Different Sum Values for Different Kinds of Dice
  1959. Tracking Sums in a Process
  1960. Train to remove duplicates from an array with filter()
  1961. Training JS #1: create your first JS function and print "Hello World!"
  1962. Training JS #10: loop statement --for
  1963. Training JS #11: loop statement --break,continue
  1964. Training JS #12: loop statement --for..in and for..of
  1965. Training JS #13: Number object and its properties
  1966. Training JS #14: Methods of Number object--toString() and toLocaleString()
  1967. Training JS #15: Methods of Number object--toFixed(), toExponential() and toPrecision()
  1968. Training JS #16: Methods of String object--slice(), substring() and substr()
  1969. Training JS #17: Methods of String object--indexOf(), lastIndexOf() and search()
  1970. Training JS #18: Methods of String object--concat() split() and its good friend join()
  1971. Training JS #19: Methods of String object--toUpperCase() toLowerCase() and replace()
  1972. Training JS #2: Basic data types--Number
  1973. Training JS #20: Methods of String object--charAt() charCodeAt() and fromCharCode()
  1974. Training JS #21: Methods of String object--trim() and the string template
  1975. Training JS #22: Unlock new skills--Arrow function,spread operator and deconstruction
  1976. Training JS #23: methods of arrayObject---push(), pop(), shift() and unshift()
  1977. Training JS #24: methods of arrayObject---splice() and slice()
  1978. Training JS #25: methods of arrayObject---reverse() and sort()
  1979. Training JS #26: methods of arrayObject---map()
  1980. Training JS #27: methods of arrayObject---filter()
  1981. Training JS #28: methods of arrayObject---every() and some()
  1982. Training JS #29: methods of arrayObject---concat() and join()
  1983. Training JS #3: Basic data types--String
  1984. Training JS #30: methods of arrayObject---reduce() and reduceRight()
  1985. Training JS #31: methods of arrayObject---isArray() indexOf() and toString()
  1986. Training JS #32: methods of Math---round() ceil() and floor()
  1987. Training JS #33: methods of Math---max() min() and abs()
  1988. Training JS #35: methods of Math---log() and its family
  1989. Training JS #36: methods of Math---kata author's lover:random()
  1990. Training JS #37: Unlock new weapon---RegExp Object
  1991. Training JS #38: Regular Expression--"^","$", "." and test()
  1992. Training JS #39: Regular Expression--"?", "*", "+" and "{}"
  1993. Training JS #4: Basic data types--Array
  1994. Training JS #40: Regular Expression--"|", "[]" and "()"
  1995. Training JS #41: Regular Expression--""
  1996. Training JS #42: Regular Expression--( ?: ), ( ?= ) and ( ?! )
  1997. Training JS #5: Basic data types--Object
  1998. Training JS #6: Basic data types--Boolean and conditional statements if..else
  1999. Training JS #7: if..else and ternary operator
  2000. Training JS #8: Conditional statement--switch
  2001. Training JS #9: loop statement --while and do..while
  2002. Training Random Testcases #2: Palindrome string
  2003. Tram Capacity
  2004. Transform To Prime
  2005. Transforming Maze Solver
  2006. Translate DNA in 6 frames
  2007. Transpose of a Matrix
  2008. Traverse array elements diagonally
  2009. Treasure Box
  2010. Tree Depth
  2011. Tree Directory
  2012. Triangle Line Task: Fizz Buzz
  2013. Triangle of Multiples (Easy One)
  2014. Triangle type
  2015. Triangular matrices.
  2016. Tribonacci Sequence
  2017. Triple Shiftian Numbers
  2018. Triple trouble
  2019. Troll Mystery Encoding
  2020. Truck driving time(Level I)
  2021. Trucks Driver Time.
  2022. True Addition
  2023. True Min
  2024. Trumpness detector
  2025. Truncate a string!
  2026. Tube strike options calculator
  2027. Turn any word into a beef taco
  2028. TV channels
  2029. Twice Their Age
  2030. Two arrays -- Zero rows and zero columns
  2031. Two cube sums
  2032. Two's complement
  2033. Two's Complement
  2034. Type of sum
  2035. Typoglycemia Generator
  2036. UN-usual Sort
  2037. Unary function chainer
  2038. Understanding closures - the basics
  2039. Unicode Madness: 東方名確認　～ Eastern Title Validator.
  2040. UniDecoder
  2041. Union of Intervals
  2042. Unique digits sequence
  2043. Unique string characters
  2044. Unique Sum
  2045. uniquePush - No Dupes!
  2046. Unit-Test Inception
  2047. Unix command line ls -l extract the file type.
  2048. Unlucky Days
  2049. Unpacking Arguments
  2050. Unsecure login - Hack this code #1
  2051. Unshackle the Beast (uncontrolled components in ReactJS)
  2052. up AND down
  2053. upperCasePlace()
  2054. Upside down numbers
  2055. Upside-Down Numbers - Challenge Edition
  2056. Upside-Down Pyramid Addition...REVERSED!
  2057. Upstream/Downstream
  2058. Upturn Numeral Triangle
  2059. Urban Dictionary
  2060. URI codec (encode/decode)
  2061. UriBuilder
  2062. UVB-76 Message Validator
  2063. Valid Curly Braces (Code Golf)
  2064. Valid GB number plate?
  2065. Valid HK Phone Number
  2066. Vending Machine
  2067. Vertical symmetry on coordinate plane
  2068. Visa application centre
  2069. Visible Dots On a Die
  2070. Volume of a Cuboid
  2071. Vowel Alternations
  2072. Vowel one
  2073. Vowel Shifting
  2074. Vowel-consonant lexicon
  2075. Walk-up Stairs
  2076. Walter's miraculous FizzBuzz factory
  2077. Warm Up for Speed.
  2078. Warrior's adventure
  2079. Waving the Stream
  2080. We are Family
  2081. We are the Robots d[(0)(0)]b
  2082. We need these data immediately!
  2083. Weight of its Contents
  2084. Weighted Grading System
  2085. Weird Factory
  2086. Welcome to Economics! #1 Consumer Price Index
  2087. Welcome to Economics! #2 Economic Surplus
  2088. What Happened To My Object?
  2089. What happened to the vowels?
  2090. What The Biggest Search Keys?
  2091. What's a Perfect Power anyway?
  2092. What's in a name?
  2093. What's the pattern?
  2094. What’s the degree?
  2095. When's my birthday ?
  2096. When's the next train to Brighton?
  2097. Where did my Ether go?
  2098. Where do they meet?
  2099. Which are in?
  2100. Which Gas Station should I pick?
  2101. Whitespace Interpreter
  2102. Who ate the cookie?
  2103. Who can still win the Formula One World Championship?
  2104. Who is going to pay for the wall?
  2105. Who wins the card game?
  2106. Whole of Names
  2107. Whose bicycle?
  2108. Word Challenges at School
  2109. Word Finder
  2110. Word Segmentation: MaxMatch
  2111. Wordify an integer
  2112. Wordsearch
  2113. WordSquare
  2114. Working With Coloured Numbers
  2115. Working With Coloured Numbers II
  2116. Working with Dictionaries
  2117. World Bits War
  2118. World Rally Championship
  2119. Wrapped Function
  2120. Write a function to sort a given string into alphabetical order
  2121. Write a letter to your friend (给远方的朋友写封信)
  2122. Write out numbers
  2123. X marks the spot!
  2124. X plus Y Card problem
  2125. xml to object - xml #1
  2126. XOR string reduction
  2127. YaCG: #1 Yet another Card Kata !
  2128. YaCG: #2 One Trick, One Taker.
  2129. YaCG: #3 "no elephant were harmed..."
  2130. Yes No Yes No
  2131. You are a Cube!
  2132. You Can't Code Under Pressure #2
  2133. You're not my type
  2134. Your Ride Is Here
  2135. Zebulan's Nightmare
  2136. Zero fill... for the Queen!
  2137. zero-balanced Array
  2138. Zeros and Ones
  2139. Ziggurat Ride of Fortune
  2140. Zonk game

List of Node 14.x Kata

The following failed to upgrade to Node 18.x automatically.

  1. Word, char and line count

List of Node 12.x Kata

The following failed to upgrade to Node 14.x/18.x automatically.

  1. Bresenham Circle Algorithm
  2. Ludicrous Coloured Triangles
  3. Two Become One - Self-extracting image

List of Node 10.x kata

The following failed to update automatically by prepending const Test = require('@codewars/test-compat'); to tests.

  1. Brick by Boring Brick - Mathematical expression interpreter
  2. Game of Go
  3. Greedy seller's quotes
  4. How can I throw an error here?
  5. Implementing Object.create -- update available
  6. Lempel–Ziv–Welch
  7. longest_palindrome
  8. Mad Mathematician's Calculator (Basic Version)
  9. Mad Mathematician's Calculator (Hardcore Version)
  10. Mean Means -- update available
  11. one line task : date converter (not that date, the other one)
  12. Papers, Please
  13. Save the Spice Harvester (Dune Universe) -- update available
  14. Simple Fun #242: Caesar Box Cipher Encoding
  15. Simple Fun #379: Division -- update available
  16. splicing
  17. Stable Weight Arrangement -- fix available
  18. The Coins of Ter | Round to the Next N
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