test922c.js

co(withYield);
withoutYield();
function timeout(sec) {
	return function(notify) {
		setTimeout(function() {
			notify(null, new Date().getTime());
		}, sec*1000);
	};
}
function co(gen) {
	var g = gen();
	function next(err, data) {
		var res;
		if(err) {
			return g.throw(err);
		} else {
			res = g.next(data);
		}
		if(!res.done) {
			res.value(next)
		}
	}
	next();
}
function * withYield() {
	var a = new Date().getTime();
	console.log('[with yield]\tcurrent timestamp: '+a);
	a = yield timeout(1);
	console.log('[with yield]\tcurrent timestamp: '+a);
	a = yield timeout(2);
	console.log('[with yield]\tcurrent timestamp: '+a);
	a = yield timeout(1);
	console.log('[with yield]\tcurrent timestamp: '+a);
}
function withoutYield() {
	var a = new Date().getTime();
	console.log('[without yield]\tcurrent timestamp: '+a);
	setTimeout(function() {
		var a = new Date().getTime();
		console.log('[without yield]\tcurrent timestamp: '+a);
		setTimeout(function() {
			var a = new Date().getTime();
			console.log('[without yield]\tcurrent timestamp: '+a);
			setTimeout(function() {
				var a = new Date().getTime();
				console.log('[without yield]\tcurrent timestamp: '+a);
			}, 1000);
		}, 2000);
	}, 1000);
}