Technical Interview #1: Count all vowels

This content originally appeared on DEV Community and was authored by Let's Code

Interview Question #1:

Write a function that counts all vowels in a sentence.?❓

If you need practice, try to solve this on your own. I have included 3 potential solutions below.

Note: There are many other potential solutions to this problem.

Solution #1: String match method

function getVowelsCount(sentence) {
  return sentence.match(/[aeuio]/gi) ? sentence.match(/[aeuio]/gi).length : 0;
}

Solution #2: for-of And regex

function getVowelsCount (sentence) {
    let vowelsCount = 0
    const vowels = ['a', 'e', 'i', 'o', 'u']

    for (let char of sentence) {
        if (/[aeiou]/gi.test(char.toLowerCase())) {
            vowelsCount++
        }
    }

    return vowelsCount
}

Solution #3: for-of AND array.includes

function getVowelsCount (sentence) {
    let vowelsCount = 0
    const vowels = ['a', 'e', 'i', 'o', 'u']

    for (let char of sentence) {
        if (vowels.includes(char.toLowerCase())) {
            vowelsCount++
        }
    }

    return vowelsCount
}

In case you like a video instead of bunch of code ??

Happy coding and good luck if you are interviewing!

This content originally appeared on DEV Community and was authored by Let's Code

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Interview Question #1:

Solution #1: String match method

Solution #2: for-of And regex

Solution #3: for-of AND array.includes

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