function copy( arr, len ) {
	var out;
	var i;

	out = [];
	for ( i = 0; i < len; i++ ) {
		out.push( arr[ i ] );
	}
	return out;
}
Copies the contents of array-like value to a new array.

@private
@param {ArrayLike} arr - input array
@param {NonNegativeInteger} len - array length
@returns {Array} output array

@example
var arr = [ 1.0, 2.0, 3.0 ];

var out = copy( arr, arr.length );
// returns [ 1.0, 2.0, 3.0 ]

var bool = ( arr === out );
// returns false