Async code flow forEach

gistfile1.js

var names = ['Juhan', 'Mikk', 'Tuuli', 'Oskar'];
var newList = [];

function welcome(name, callback) {
	name += ', hello';
	console.log(name);	
	newList.push(name);
	callback(null, name);
}

async.forEach(names, welcome, function(err) {
	console.log('Completed');
	console.log(newList);
});