Thanks for the reply, Alex.
Is it possible for nodejs to provide such semantic guarantees in future?
Have a defined order of invocation of listeners comes very handy in many
cases. And I assume there should not be a performance loss in providing
such guarantees.
-Chaoran
On Friday, October 4, 2013 2:03:05 PM UTC-5, Alex Kocharin wrote:
>
>
> No, they are implementation-dependent. So unless events module will get "5
> - Frozen" stability level, I wouldn't count on this hack to last forever.
>
> But there's a good chance that it won't be changed in stable branch.
>
>
> On Friday, October 4, 2013 8:09:40 PM UTC+4, Chaoran Yang wrote:
>>
>> Questions 1: Are event listeners always invoked synchronously?
>>
>> For example, If I do:
>>
>> event.on("end", function() {
>> console.log("end");
>> });
>> event.emit("end");
>> event.removeAllListeners();
>>
>> Does this code always prints "end" every time?
>>
>> Question 2: Are event listeners always invoked in the order of they are
>> attached?
>>
>> For example, if I do:
>>
>> event.on('end', function() {
>> console.log('end');
>> });
>> event.on('end', function() {
>> event.removeAllListeners();
>> });
>> event.emit('end');
>>
>> Does this code always prints "end" every time?
>>
>> For all tests I ran, the answers to both of these questions are YES. But
>> I'm not sure whether these are semantics I can rely on across difference
>> versions of nodejs. Does nodejs provides these semantics guarantees, or are
>> they implementation dependent?
>>
>> Thanks,
>> Chaoran Yang
>>
>>
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