code: function(search, fn) {
        var match, i, len;
        if(isFunction(search)) {
          fn = search;
          search = /[\s\S]/g;
        } else if(!search) {
          search = /[\s\S]/g
        } else if(isString(search)) {
          search = regexp(escapeRegExp(search), 'gi');
        } else if(isRegExp(search)) {
          search = regexp(search.source, getRegExpFlags(search, 'g'));
        }
        match = this.match(search) || [];
        if(fn) {
          for(i = 0, len = match.length; i < len; i++) {
            match[i] = fn.call(this, match[i], i, match) || match[i];
          }
        }
        return match;
      }
docs: *
  @method each([search] = single character, [fn])
  @returns Array
  @short Runs callback [fn] against each occurence of [search].
  @extra Returns an array of matches. [search] may be either a string or regex, and defaults to every character in the string.
  @example
  
  'jumpy'.each() -> ['j','u','m','p','y']
  'jumpy'.each(/[r-z]/) -> ['u','y']
  'jumpy'.each(/[r-z]/, function(m) {
  // Called twice: "u", "y"
  });
  
  *