gistfile1.txt

function joinBuffers(b1, b2){
	// if one arg is null, be smart
	if (!b1) return b2;
	if (!b2) return b1;

	var l1 = b1.length;
	var l2 = b2.length;

	var b3 = new Buffer(l1 + l2);

	b1.copy(b3, 0, 0, l1)
	b2.copy(b3, l1, 0, l2);

	return b3;
}