code: function contains_expr(arr) {
      if(!arr || !arr.length) return false;
      var l = arr.length;
      while(l-- > 0) if(LONG_SWITCH_RE.test(arr[l])) return true;
      return false;
  }
docs: Loop's trough all elements of an array and check if there is valid options expression within. An valid option is a token that starts double dashes. E.G. --my_option