On Tue, Sep 23, 2014 at 7:29 AM, Alexey Petrushin < [email protected]> wrote:
> Ha-ha, very good example, compare this async version it with the sync > version below, and tell me that there's no problem with > callbacks """if you know how to deal with it""" :D > > Not saying that in even such a simple code it's extremely > easy to make small errors like missing `else` statements etc. > > Also it doesn't preserve the call stack - so when you see error in console > you would have no context and no idea what happened... > And it still doesn't catch the sync errors... > And some of callbacks can be fired twice... > And with streams there are lots of events fired and should be properly > handled... > > And still many insist that it is "not a problem". > I don't insist it's "not a problem", but programming is always going to present challenges. I've programmed in both sync and async code, and neither is perfect. Node basically has trade-offs - I get better performance [1] at the expense of a slightly cumbersome programming model. I could go even more cumbersome for even more performance if I switched to C++ or Java. But I'm OK with where Node takes me for now. The flip side with sync code of course is that sync programming is often a lot harder than people make it out to be. Your sync version doesn't handle errors at all, for example. Error handling is very language/environment specific and often an area of huge neglect. One thing Node got right was to always use the "error first" callback approach, that makes things like Streamline and Async.js possible. It's not perfect but all programming is trade-offs. Matt. [1] Whoever was arguing that Ruby and/or Rails has equal performance obviously has never ported a large project from Rails - I have and the performance difference is staggering -- Job board: http://jobs.nodejs.org/ New group rules: https://gist.github.com/othiym23/9886289#file-moderation-policy-md Old group rules: https://github.com/joyent/node/wiki/Mailing-List-Posting-Guidelines --- You received this message because you are subscribed to the Google Groups "nodejs" group. To unsubscribe from this group and stop receiving emails from it, send an email to [email protected]. To post to this group, send email to [email protected]. To view this discussion on the web visit https://groups.google.com/d/msgid/nodejs/CAPJ5V2be0kB89mVZa3wPKOqJ-qvSbB2i__7XVfEBcUvWV_ZdCA%40mail.gmail.com. For more options, visit https://groups.google.com/d/optout.
