code: function (arr) {
          var result = true;
          arr.forEach(function (elem) {
              if (!(typeof elem === 'string' || typeof elem === 'number')) {
                  result = false;
              }
          });
  
          return result;
      }
docs: areAllStringOrNumber
  
  Check in an array contains only string and number
  
  @param  {Array} arr
  @retrun {Boolean}