Discussion on: Daily Challenge #3 - Vowel Counter

[willsmart]

JS one that's probably pretty speedy

vowelCount = string => {
  let count = 0,
    i;
  for (i = string.length; i > 0; ) {
    const c = string.charCodeAt(--i) & ~0x20; // that's a tilde btw
    count+=Number(c < 70 ? c == 69 || c == 65 : c == 73 || c == 79 || c == 85)
  }
  return count;
};

Note that:

{E:'E'.charCodeAt(0), A:'A'.charCodeAt(0), I:'I'.charCodeAt(0), O:'O'.charCodeAt(0), U:'U'.charCodeAt(0)}

-> {E:69, A:65, I:73, O:79, U:85}

and vowels go pretty much eaiou in terms of how common they are in english.