How nodejs works with a callback

Asked Aug 24 '14 at 19:02

Active Aug 24 '14 at 19:34

Viewed 65 times

here is some code, just as a example

obj.process('something', function(err, data) {
    dosometing(data);
});

why the callback function is executed, other than exit the program?

Node must save something. I know it must be related to event loop. but how? I got some about it from google but still puzzed.

thanks

update
since someone think this is unclear, as @hereandnow78 said, I want to ask is why the program is not exiting after obj.process and instead is waiting for the callback to happen

edited Aug 24 '14 at 19:34

asked Aug 24 '14 at 19:02

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Your question is very unclear. – SLaks Aug 24 '14 at 19:04
Maybe you can show a more real-world example and then more clearly describe the problem via an [edit]. – jamesmortensen Aug 24 '14 at 19:05
i think his question is, why the program is not exiting after obj.process and instead is waiting for the callback to happen – hereandnow78 Aug 24 '14 at 19:06
Possible dupe of http://stackoverflow.com/questions/19699619/when-does-nodejs-process-quit – JohnnyHK Aug 24 '14 at 19:36

How nodejs works with a callback

0 Answers0