JavaScript - vowelScan.txt

Return the number of vowels in the given string.


- - - - - my answer - - - - -

function getCount(str) {
  var vowelsCount = str.split(/[aeiou]/i).length-1;
  
  return vowelsCount;
}

vowel_count("When I First come to this country in 1849");


- - - explanation - - -

- ‘.split’ divides the string anywhere the regEx is fulfilled.
- the regex ‘/[aeiou]/i’ indicates any instance of “aeiou” (‘/i’ indicates a case insensitive regEx)
- this will return an array looking like:
	=> [ 'Wh', 'n ', ' F', 'rst c', 'm', ' t', ' th', 's c', '', 'ntry ', 'n 1849' ]
- the above array.length-1 returns the number of elements in this newly created array.

-possible issues would be a string which begins with or ends with a vowel.



- - - - - alternative - - - - -
I like this method better. its similar, but removes some of the possible edge cases the above function leaves.


var getCount = function (str) {
    var matches = str.match(/[aeiou]/gi);
    var vowelsCount = matches ? matches.length : 0;
    return(vowelsCount);
};

getCount("When I First come to this country in 1849");


- use ‘.match’ to find each instance of a regular expression.
- ternary statement evaluates left to right. return matches if true, return 0 if not.