js 模糊搜索

function fuzzysearch (needle, haystack) {
  var hlen = haystack.length;
  var nlen = needle.length;
  if (nlen > hlen) {
    return false;
  }
  if (nlen === hlen) {
    return needle === haystack;
  }
  outer: for (var i = 0, j = 0; i < nlen; i++) {
    var nch = needle.charCodeAt(i);
    while (j < hlen) {
      if (haystack.charCodeAt(j++) === nch) {
        continue outer;
      }
    }
    return false;
  }
  return true;
}
fuzzysearch(‘twl‘, ‘cartwheel‘) // <- true