code: function contains(value, elem) {
          if (validateHelpers.isArray(elem)) {
              for (var i = 0, len = elem.length; i < len; i += 1) {
                  if (elem[i] === value) {
                      return true;
                  }
              }
          }
  
          if (validateHelpers.isString(elem)) {
              return elem.indexOf(value) >= 0;
          }
  
          return false;
      }
docs: Check if value contains in an element
  
  @category Global
  @param {String} value - Value to check
  @param {String|Array} elem - String or array
  @return {Boolean} - Return true if element contains a value