exercises done

JavaScript/1-identifiers.js

@@ -1,19 +1,10 @@
 'use strict';
 
-const INTERVAL = 500;
-let counter = 0;
-const MAX_VALUE = 10;
-let timer = null;
+let myName = 'dan';
+const year = 1994;
+const Hello = name => console.log('Hello, ' + name + '!');
 
-const event = () => {
-  if (counter === MAX_VALUE) {
-    console.log('The end');
-    clearInterval(timer);
-    return;
-  }
-  console.dir({ counter, date: new Date() });
-  counter++;
-};
+Hello('Aeloth');
+Hello(myName);
+Hello(year);
 
-console.log('Begin');
-timer = setInterval(event, INTERVAL);

JavaScript/2-loop.js

@@ -1,9 +1,21 @@
 'use strict';
 
-const MAX_VALUE = 10;
+const MIN_VALUE = 15;
+const MAX_VALUE = 30;
 
 console.log('Begin');
-for (let i = 0; i < MAX_VALUE; i++) {
-  console.dir({ i, date: new Date() });
+for (let i = MIN_VALUE; i <= MAX_VALUE; i++) {
+  if (i % 2 !== 0) console.dir(i);
 }
-console.log('The end');
+console.log('The end \n');
+
+
+const range = (start, end) => {
+  console.log('Begin function');
+  for (let i = start; i <= end; i++) {
+    if (i % 2 !== 0) console.dir(i);
+  }
+  console.log('The end function');
+};
+
+range(12, 33);

JavaScript/3-function.js

@@ -1,8 +1,9 @@
 'use strict';
 
-const add = (a, b) => a + b;
+const average = (a, b) => ((a + b)/2);
+const square = (x) => x**2;
+const cube = (x) => x**3;
 
-console.log('Add numbers: 5 + 2 = ' + add(5, 2));
-console.log('Add floats: 5.1 + 2.3 = ' + add(5.1, 2.3));
-console.log('Concatenate: \'5\' + \'2\' = ' + add('5', '2'));
-console.log('Subtraction: 5 + (-2) = ' + add(5, -2));
+for (let i = 0; i < 10; i++) {
+console.log(`${i}: ` + average(square(i), cube(i)));
+}

JavaScript/4-object.js

@@ -1,13 +1,18 @@
 'use strict';
 
-const welcome = person => {
-  console.log(`Ave, ${person.name}!`);
-};
+const test = { name: 'dan' };
+let test2 = { name: 'ada' };
+
+test.name = 'rex';
+test2.name = 'odo';
 
-const marcus = { name: 'Marcus Aurelius' };
-const mao = { name: 'Mao Zedong' };
-const cartesius = { name: 'Rene Descartes' };
+const createUser = (name, city) => {
+  const user = {
+    name,
+    city,
+  };
+
+  return user;
+};
 
-welcome(marcus);
-welcome(mao);
-welcome(cartesius);
+console.log(createUser('dan', 'zu'));

JavaScript/5-array.js

@@ -1,15 +1,13 @@
 'use strict';
 
-const welcome = person => {
-  console.log(`Ave, ${person.name}!`);
-};
-
 const persons = [
-  { name: 'Marcus Aurelius' },
-  { name: 'Mao Zedong' },
-  { name: 'Rene Descartes' },
+  { name: 'Marcus Aurelius', phone: '+380445554433' },
 ];
 
-for (const person of persons) {
-  welcome(person);
-}
+const findPhoneByName = name => {
+  for (const id of persons) {
+    if ( id.name === name) return (id.phone);
+  }
+};
+
+console.log(findPhoneByName('Marcus Aurelius'));

JavaScript/6-hash.js

@@ -1,16 +1,15 @@
 'use strict';
 
-const welcome = person => {
-  console.log(`Ave, ${person.name}!`);
+const persons = {
+  marcus: { name: 'Marcus Aurelius', phone: '+380554433' },
+  mao: { name: 'Mao Zedong', phone: '+38544444' },
+  rene: { name: 'Rene Descartes', phone: '+38011111' },
 };
 
-const persons = {
-  marcus: { name: 'Marcus Aurelius' },
-  mao: { name: 'Mao Zedong' },
-  rene: { name: 'Rene Descartes' },
+const findByName = name => {
+  console.log(name+'\'s phone number is ' + persons[name].phone);
 };
 
-for (const name in persons) {
-  const person = persons[name];
-  welcome(person);
-}
+findByName('marcus');
+
+findByName('rene');