function append( obj, items ) {
	var len;
	var i;
	len = obj.length;
	for ( i = 0; i < items.length; i++ ) {
		obj[ len+i ] = items[ i ];
	}
	obj.length = len + items.length;
	return obj;
}
Adds elements from a collection to the end of an array-like object.

@private
@param {Object} obj - input array-like object
@param {ArrayLike} items - items to add
@returns {Object} input object

@example
var obj = {
    'length': 2,
    '0': 1.0,
    '1': 2.0
};

obj = append( obj, [ 3.0, 4.0 ] );
// returns { 'length': 4, '0': 1.0, '1': 2.0, '2': 3.0, '3': 4.0 }