ugokanu.hx

class Set<K> {
	var map: Map<K,Bool>;
	public function new() {
		this.map = new Map<K,Bool>();
	}

	public function add(k:K): Void {
		this.map.set(k, true);
	}
	public function has(k:K): Bool {
		return this.map.exists(k);
	}
	public function iterator(): Iterator<K> {
		return this.map.keys();
	}
}