#4-Javascript

Author: CaveroBrandon

Roadmap/04 - CADENAS DE CARACTERES/javascript/CaveroBrandon.js

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+/*
+EJERCICIO:
+Muestra ejemplos de todas las operaciones que puedes realizar con cadenas de caracteres
+en tu lenguaje. Algunas de esas operaciones podrían ser (busca todas las que puedas):
+- Acceso a caracteres específicos, subcadenas, longitud, concatenación, repetición, recorrido,
+conversión a mayúsculas y minúsculas, reemplazo, división, unión, interpolación, verificación...
+*/
+const operationString = 'Hello world';
+const supportString = 'Javascript!';
+
+console.log('Original string: ' + operationString);
+console.log('Access to second character: ' + operationString[1]);               // Accesing an specific character
+console.log('Verifying the existence of a substring: ', operationString.includes('world'))  // Finding a substring
+console.log('Getting the substring index: ', operationString.indexOf('world')); // Finding the index of a substring
+console.log('Extracting a substring: ', operationString.slice(-5));             // Extracting a substring
+console.log('String lenght is: ' + operationString.length);                     // Length of a string
+console.log('Concatenated string: ' + `${operationString} - ${supportString}`); // Concatenating strings
+console.log('Repeat a string: ', supportString.repeat(2));                      // Repeating a string
+console.log('Convert to upper case: ', supportString.toUpperCase());            // Converting to upper cas
+console.log('Convert to lower case: ', supportString.toLowerCase());            // Converting to lower case
+console.log('Replacing a substring: ', operationString.replace('world', supportString));    // Replacing a substring with other substring
+console.log('Spliting a string: ', operationString.split(' '));                 // Spliting a string
+console.log(`Interpolating a string in ${supportString}`);                      // Interpolating a string
+console.log('Using scape characters:\n', operationString);                      // Scape characters
+// Iterating a string
+for (i in supportString) {
+    console.log(supportString[i]);
+}
+
+/*
+DIFICULTAD EXTRA (opcional):
+Crea un programa que analice dos palabras diferentes y realice comprobaciones
+para descubrir si son:
+- Palíndromos
+- Anagramas
+- Isogramas
+*/
+
+function preProcess(userText) {
+    let lowerCaseString = userText.toLowerCase();
+    let originalString = lowerCaseString.split(' ').join('');
+    return originalString.split('');
+}
+
+function isPalindrome(userText) {
+    let lowerCaseString = userText.toLowerCase();
+    let originalString = lowerCaseString.split(' ').join('');
+    let splitArray = originalString.split('');
+    let reversedString = splitArray.reverse().join('');
+    
+    if (reversedString == originalString) {
+        console.log(`The text "${userText}" is palindrome`);
+        return true;
+    }
+    else {
+        console.log(`The text "${userText}" is not a palindrome`);
+        return false;
+    }
+}
+
+function isAnagram(firstText, secondText) {
+    let firstTextArray = preProcess(firstText);
+    let secondTextArray = preProcess(secondText);
+
+    if (firstTextArray.sort().join('') === secondTextArray.sort().join('')) {
+        console.log(`The texts "${firstText}" and "${secondText}" are anagrams`);
+        return true;
+    }
+    else {
+        console.log(`The texts "${firstText}" and "${secondText}" are not anagrams`);
+        return false;
+    }
+
+}
+
+function isIsogram(userText) {
+    let userTextArray = preProcess(userText);
+    
+    let evaluationSet = new Set();
+    userTextArray.forEach(element => {
+        evaluationSet.add(element);
+    });
+    evaluationArray = Array.from(evaluationSet);
+    if (userTextArray.join('') === evaluationArray.join('')) {
+        console.log(`The text "${userText}" is an isogram`);
+        return true;
+    }
+    else {
+        console.log(`The text "${userText}" is not an isogram`);
+        return false;
+    }
+
+}
+
+console.log('----- Palindrome -----')
+isPalindrome('Hello Javascript');
+isPalindrome('Nurses run');
+console.log('----- Anagrams -----');
+isAnagram('Javascript', 'Cinema');
+isAnagram('iceman', 'Cinema');
+console.log('----- Isogram -----');
+isIsogram('Javascript');
+isIsogram('Lumberjacks');