function getArrayLike( arr, idx ) {
	return arr[ idx ];
}
Returns an element from an indexed array-like object.

@private
@param {Collection} arr - input array
@param {NonNegativeInteger} idx - element index
@returns {*} element value

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

var v = getArrayLike( arr, 2 );
// returns 3