Same as above.
A "callback" is meant to be called back after some operations are made. In
node, that means they're probably gonna get called when the current stack
has unwound. If you called the callback synchronously, that means it
behaves differently.
process.nextTick un most cases execute the given function immediately after
the current stack ends (with some limitations for recursivity) so it's not
really a performance killer.
Doing so helps you respect your function/method contract :)
Saying that "in most case, it's not needed" is too big of an assumption of
what your user is doing with your code. IMO.
On Tuesday, 20 August 2013 19:47:22 UTC+2, Bryan Donovan wrote:
>
> I have been writing node.js client code for a couple of years now, and
> have authored a couple open source libraries, but somehow I missed the memo
> telling me that I'm supposed to wrap 'synchrounous' callbacks in
> process.nextTick(). I kind-of understand why that is a best-practice, but
> what I don't understand is what the drawback is if you don't do it.
>
> For example, I write code like this all the time, and have never had a
> single problem with it:
>
> function getSomething(args, cb) {
> if (!args) { return cb(new Error('args required')); }
> if (!args.id) { return cb(new Error('args.id required')); }
>
> SomeDatabase.get({id: args.id}, cb);
> }
>
> What are the potential issues with not wrapping those arg checks in
> process.nextTick()?
>
>
> Thanks,
>
> Bryan
>
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