import { Disposable, CompositeDisposable, SerialDisposable } from 'disposables';

// or you can import just the ones you need to keep it even tinier
// import SerialDisposable from 'disposables/modules/SerialDisposable';

function attachHandlers(node) {
	let someHandler = ...;
	node.addEventHandler(someHandler);

	// use Disposable to guarantee single execution
	return new Disposable(() => {
	  node.removeEventHandler(someHandler);
	});
}

// CompositeDisposable lets you compose several disposables...
let nodes = ...;
let compositeDisp = new CompositeDisposable(nodes.map(attachHandlers));

// and more later...
let moreNodes = ...
moreNodes.map(attachHandlers).forEach(d => compositeDisp.add(d));

// and dispose them at once!
function goodbye() {
	compositeDisp.dispose();
}

// ... or replace with a bunch of new ones ...
let serialDisp = new SerialDisposable();
serialDisp.setDisposable(compositeDisp);

function replaceNodes(newNodes) {
	let nextCompositeDisp = new CompositeDisposable(newNodes.map(attachHandlers));

	// release all the previous disposables:
	serialDisp.setDisposable(nextCompositeDisp);
}

// with a guarantee of each dispose() called only once.