I'm newbie on Node.js, because of its asynchronous sometimes I confused how can I control function execute order. Imagin there are two functions below.
function login(id, pw){
// do something
}
function getMyInfo(){
// do something
};
The login() function should work firstly. and then getMyInfo(). How can I do it? I tried to this :
login(id, pw, function(err){
// do something
if(err) return next();
getMyInfo();
});
But It doesn't work. How can I do it?
This is called "callbacks"
function login(id, pw, cb){
// do something
// after you're done:
cb();
}
function getMyInfo(){
// do something
};
Make use of callbacks.
Suppose you want that execution of function 2 must not take place before function 1 then call function 2 as successful callback for function 1.
They are like promises in other languages.
You can make use of Q module if you don't like callbacks.
http://www.tutorialspoint.com/nodejs/nodejs_callbacks_concept.htm
Simple and Easy Tutorial
