/**********************************************************************
* 
*
*
**********************************************************************/
((typeof define)[0]=='u'?function(f){module.exports=f(require)}:define)
(function(require){ var module={} // make module AMD/node compatible...
/*********************************************************************/




/*********************************************************************/

// Set set operation shorthands...
Set.prototype.unite = function(other){ 
	return new Set([...this, ...other]) }
Set.prototype.intersect = function(other){
	var test = other.has ?  'has' : 'includes'
	return new Set([...this]
		.filter(function(e){ return other[test](e) })) }
Set.prototype.subtract = function(other){
	other = new Set(other)
	return new Set([...this]
		.filter(function(e){ return !other.has(e) })) }




/**********************************************************************
* vim:set ts=4 sw=4 :                               */ return module })