Function charType

ts/codediff/char-diffs.ts:116–122

(c: string)

    WS = 4,
    SYM = 5;
  const charType = function (c: string) {
    if (/[a-z]/.exec(c)) return LC;
    if (/[A-Z]/.exec(c)) return UC;
    if (/[0-9]/.exec(c)) return NUM;
    if (/\s/.exec(c)) return WS;
    return SYM;
  };

  // Single words can be [A-Z][a-z]+, [A-Z]+, [a-z]+, [0-9]+ or \s+.
  const words = [];