extendVowels.js

// Extend the Vowels

// Create a function that takes a word and extends all vowels by a number num.

// extendVowels("Hello", 5) ➞ "Heeeeeelloooooo"

// extendVowels("Edabit", 3) ➞ "EEEEdaaaabiiiit"

// extendVowels("Extend", 0) ➞ "Invalid"

// Notes
// Return "invalid" if num is not a positive integer or 0.

// Pseudocode
// write a function "extendVowels" function takes a string and a number
// take a variable to store result string "resultStr"
// convert string to array and loop through
// if vowel is found concat to "resultStr" by repeating same letter number of times given in input plus one
// if not just concat to "resultStr" once
// return resultStr



let isVowel = char => ['a', 'e', 'i', 'o', 'u'].includes(char.toLowerCase());
function extendVowels(str, num) {
  if (num < 1) return 'invalid';
  let resultStr = '';
  [...str].forEach(char => {
    if (isVowel(char)) {
      resultStr = resultStr + char + char.repeat(num);
    } else {
      resultStr = resultStr + char;
    }
  });
  return resultStr;
}
console.log(extendVowels('Hello', 5));
console.log(extendVowels('Edabit', 3));
console.log(extendVowels('Extend', 0));