Feature detection is intended for known features but unknown combinations
of them. For example, in that hypothetical 1.0, you can only detect that
the event name is back, not that it means the same as it did in 0.6.
On Thursday, June 21, 2012 1:36:01 PM UTC+2, Diogo Resende wrote:
>
> I understand your point, but imagine that in 1.0 or 0.10 the event name
> comes back to what it was in 0.6. If I had a something like
> EventModule.hasEvent("x") I didn't need to do this. Of course to do this,
> the modules had to register the event.
>
> This only applies to events, methods are pretty easy to detect. This is
> just an idea of an "upgrade" to the EventEmitter.
>
> Well.. I'll have to base the code on node version...
>
> --
> Diogo Resende
>
> On Thursday, June 21, 2012 at 10:57 , Arunoda Susiripala wrote:
>
> I think you should execute the code depending on the node-version.
> something like feature detection does not need here since we knows the
> changes from 0.6 to 0.8
>
> On Thu, Jun 21, 2012 at 3:24 PM, Aleksey V Zapparov
> <[email protected]>wrote:
>
> On Thu, 21 Jun 2012 10:35:15 +0100
> Diogo Resende <[email protected]> wrote:
>
> > I have a module (node-rack) to abstract the cluster module. It was
> > built for 0.6 and I want to be able to support 0.8 too but not
> > dropping 0.6 support. I noticed for example that `kill()` was renamed
> > to `destroy()`. I think this can be easy to detect but what about
> > events? `death`event was changed to `exit`.
>
> you can subscribe to multiple events.
>
> > Is there a way to know what events an object supports or should I
> > just check the node version (using process.version.node) and do my
> > changes from there?
> >
> > I would prefer the first option as it's similar to feature detection.
> > This way I would just check for available methods and events and use
> > the preferred (and available) ones.
>
> Alternatively, yes you ca do it the way we are dealing with different
> browsers: have a map of internal representation to actual one. In
> general it can be represented as:
>
> ``` javascript
> function get_node_ver() {
> // some decisions and return as `06` for `0.6.x`, etc.
> }
>
> var EVENTS = {
> '06': {
> exit: 'death',
> // ...
> },
> '08': {
> exit: 'exit',
> // ...
> }
> };
>
>
> EVENTS = EVENTS[get_node_ver()];
> ```
>
>
> --
> Sincerely yours,
> Aleksey V. Zapparov A.K.A. ixti
> FSF Member #7118
> Mobile Phone: +34 677 990 688
> Homepage: http://www.ixti.net
> JID: [email protected]
>
> *Origin: Happy Hacking!
>
>
>
>
> --
> Arunoda Susiripala
>
> @arunoda <http://twitter.com/arunoda>
> <http://gplus.to/arunoda>https://github.com/arunoda
> http://www.linkedin.com/in/arunoda
>
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