masautt

function getAllPermutations(string) {
  var results = [];

  if (string.length === 1) {
    results.push(string);
    return results;
  }

  for (var i = 0; i < string.length; i++) {
    var firstChar = string[i];

masautt

function reverseWords(str) {
        var result = "";
        var wordArray = str.split(" ");
        for(var i = wordArray.length - 1; i >= 0; i--) {
            result += wordArray[i] + " ";
        }
        return result.trim();
}

console.log(reverseWords("Marek E. Sautter")); // --> "Sautter E. Marek"

masautt

function firstNonRepeat(string) {
    return string.split('').filter(function (character, index, obj) {
        return obj.indexOf(character) === obj.lastIndexOf(character);
    }).shift();
}

console.log(firstNonRepeat("----Marek-----")); // --> "M"

masautt

function checkPalindrome (str) {
  return str == str.split('').reverse().join('');
}

console.log(checkPalindrome("Marek")); // --> false
console.log(checkPalindrome("kayak")); // --> true

// https://stackoverflow.com/questions/14813369/palindrome-check-in-javascript

masautt

function isAnagram (a, b) {
    var y = a.split("").sort().join(""),
        z = b.split("").sort().join("");
    return (z === y)
}

console.log(isAnagram("marek", "kemra")) // --> true
console.log(isAnagram("sautter", "sautrra")) // --> false

// https://stackoverflow.com/questions/23785465/javascript-anagram-comparison

masautt

console.log(parseInt("8675309 hmu :)")) // --> 8675309

console.log(parseFloat("3.14 is PI")) // --> 3.14

// https://gomakethings.com/converting-strings-to-numbers-with-vanilla-javascript/

masautt

let num = 8675309
console.log(num.toString()) // --> "8675309"

masautt

function checkNum(str) {
  return /^\d+$/.test(str)
}
console.log(checkNum("8675309")); // --> true
console.log(checkNum("867S309")); // --> false

// https://stackoverflow.com/questions/1779013/check-if-string-contains-only-digits

masautt

function getLetters(words) {
  var words      = (typeof words == 'string') ? words : '',
      count      = re => (words.match(re) || []).length,
      vowels     = count(/[aeiou]/ig),
      consonants = count(/[bcdfghjklmnpqrstvxzwy]/ig);

  return {vowels, consonants};
}

console.log(getLetters("Marek Sautter")); // --> { vowels: 5, consonants: 7 }

masautt

String.prototype.count=function(s1) { 
    return (this.length - this.replace(new RegExp(s1,"g"), '').length) / s1.length;
}

console.log("Marek Sautter".count("e")); // --> 2

console.log("I got a letter from Marek Sautter".count("tt")); // --> 2

// https://stackoverflow.com/questions/881085/count-the-number-of-occurrences-of-a-character-in-a-string-in-javascript