function indexed( x, n, y, stride, offset ) {
	var flg;
	var io;
	var i;

	flg = false;
	io = offset;
	for ( i = 0; i < x.length; i++ ) {
		if ( !flg && x[ i ] ) {
			n -= 1;
			if ( n <= 0 ) {
				flg = true;
			}
		}
		y[ io ] = flg;
		io += stride;
	}
	return y;
}
Cumulatively tests whether at least `n` array elements in a provided array are truthy.

@private
@param {Collection} x - input array
@param {integer} n - number of elements
@param {Collection} y - output array
@param {integer} stride - output array stride
@param {NonNegativeInteger} offset - output array offset
@returns {Collection} output array

@example
var x = [ false, false, false, true, true ];
var y =  [ false, null, false, null, false, null, false, null, false, null ];

var out = indexed( x, 2, y, 2, 0 );
// returns [ false, null, false, null, false, null, false, null, true, null ]