Re: @try @catch
Re: @try @catch
- Subject: Re: @try @catch
- From: Graham Cox <email@hidden>
- Date: Thu, 14 Aug 2008 21:21:47 +1000
On 14 Aug 2008, at 8:58 pm, Georg Seifert wrote:
is it recommended to use @try .. @catch blocks as flow control like
it is used in Python. They say explicitly to use it rather than do a
lot of test before just try if it works to look after it only if it
fails.
Hmmm, I'll be looking forward to the replies to this question!
My view is absolutely NOT to use try/catch for flow control. They were
invented to handle exceptional conditions, and that's what they should
be used for. They are not a substitute for proper conditional clauses
and properly structured code. I believe the Python advice (which I
take at face value, not being familiar with Python) is misguided at
best, though may suit that language better. Also, my understanding is
that while a try block is very cheap, the catch block is not. Since
they are only expected to be run once in a blue moon, that's
reasonable, but if they are used routinely, performance is likely to
suffer.
cheers, Graham
_______________________________________________
Cocoa-dev mailing list (email@hidden)
Please do not post admin requests or moderator comments to the list.
Contact the moderators at cocoa-dev-admins(at)lists.apple.com
Help/Unsubscribe/Update your Subscription:
This email sent to email@hidden
| References: | |
| | >@try @catch (From: Georg Seifert <email@hidden>) |