algos/vowelCount.js at main · davidmichaelmackey/algos · GitHub

1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
// Write code to return the the number of vowels in `str`

var vowelCount = function(str) {
  var result = 0;
  var vowels = [ "a", "e", "i", "o", "u" ];

  for (var i = 0; i < str.length; i++) {
    var letter = str[ i ].toLowerCase();

    if (vowels.indexOf(letter) !== -1) {
      result += 1;
    }
  }

  return result;
};

// Alternatively, this problem could have been solved without the use of `indexOf`, but by using the logical OR (||) operator to check for each vowel

// var vowelCount = function (str) {
//   var result = 0;

//   for (var i = 0; i < str.length; i++) {
//     var letter = str[i].toLowerCase();

//     if (letter === "a" || letter === "e" || letter === "i" || letter === "o" || letter === "u") {
//       result += 1;
//     }
//   }

//   return result;
// };

// OTHER ALTERNATIVES
// vowelCount

// function getCount(str) {
//   return (str.match(/[aeiou]/ig) || []).length;
// }

// function getCount(str) {
//   let vowelsCount = 0
//   const vowels = ['a', 'e', 'i', 'o', 'u']
//   for (let char of str) {
//     if (vowels.includes(char)) {
//       vowelsCount++
//     }
//   }
//   return vowelsCount
// }