code: function contains( arr, str ) {
  	var len = arr.length,
  		i;
  
  	for ( i = 0; i < len; i++ ) {
  		if ( arr[ i ] === str ) {
  			return true;
  		}
  	}
  	return false;
  }
docs: end FUNCTION ascending() 
  FUNCTION: contains( arr, str )
  Validates if an array contains an input string.
  
  @private
  @param {Array} arr - search array
  @param {String} str - search string
  @returns {Boolean} boolean indicating if an array contains an input string