code: function(needle) {
        if (arr.indexOf) {
          return arr.indexOf(needle) !== -1;
        } else {
          for (var i=0, length=arr.length; i<length; i++) {
            if (arr[i] === needle) { return true; }
          }
          return false;
        }
      }
docs: Check whether a given object exists in an array
  
  @example
  wysihtml5.lang.array([1, 2]).contains(1);
  // => true