function internal( x ) {
	var out;
	var i;

	out = [];
	for ( i = x.length-1; i >= 0; i-- ) {
		out.push( x[ i ] );
	}
	return out;
}
Returns a new array with elements in reverse order.

@private
@param {Collection} x - input array
@returns {Collection} output array

@example
var x = [ 1, 2, 3, 4 ];

var out = internal( x );
// returns [ 4, 3, 2, 1 ]