Discussion on: Daily Challenge #3 - Vowel Counter

[Jonathan Kuhl]

JavaScript, using reduce:

function countVowels(string) {
    const vowels = 'aeiouAEIOU';
    return string.split('').reduce((counter, current) => {
        if(vowels.indexOf(current) != -1) {
            if(counter[current]) {
                counter[current] += 1;
            } else {
                counter[current] = 1;
            }
        }
        return counter;
    }, {});
}

console.log(countVowels('How much wood would a woodchuck chuck if a woodchuck could chuck wood?'));

// { o: 11, u: 7, a: 2, i: 1 }