class Container {
	constructor() {
		this.pos = { x: 0, y: 0 };
		this.children = [];
	}

	add(child) {
		this.children.push(child);
		return child;
	}

	remove(child) {
		this.children = this.children.filter(c => c !== child);
		return child;
	}

	map(f) {
		return this.children.map(f);
	}

	update(dt, t) {
		this.children = this.children.filter(child => {
			if (child.update) {
				child.update(dt, t, this);
			}
			return child.dead ? false : true;
		});
	}
}
module.exports = Container;