function cusome( x, n ) {
	var y = filled( true, x.length );
	return assign( x, n, y, 1, 0 );
}
Cumulatively tests whether at least `n` array elements in a provided array are truthy.

@param {Collection} x - input array
@param {integer} n - number of elements
@returns {Array} output array

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

var y = cusome( x, 2 );
// returns [ false, false, false, false, true ]