function indexed( out, stride, offset ) {
	var v;
	var i;

	i = offset;
	v = 0;
	while ( i >= 0 && i < out.length ) {
		out[ i ] = v;
		i += stride;
		v += 1;
	}
	return out;
}
Fills an indexed array with linearly spaced numeric elements which increment by 1 starting from zero.

@private
@param {Collection} out - output array
@param {integer} stride - output array stride
@param {NonNegativeInteger} offset - output array index offset
@returns {Collection} output array

@example
var out = [ 0, 0, 0, 0, 0, 0 ];

var arr = indexed( out, 1, 0 );
// returns [ 0, 1, 2, 3, 4, 5 ]

@example
var out = [ 0, 0, 0, 0, 0, 0 ];

var arr = indexed( out, -1, out.length-1 );
// returns [ 5, 4, 3, 2, 1, 0 ]