On Thu, 24 Apr 2014 09:44:42 -0700, Jens Alfke said: >> NSString x; >> x = (x) ?: @"yo"; > >It’s not a terrible idea; I use this pattern a lot. > >The ternary operator doesn’t just work on integers. It’s like “if”, it >takes any expression that can be interpreted as a boolean. For a pointer >the test is implicitly the same as “x != nil”. The example you gave is >exactly equivalent to > if (x) > x = x; > else > x = @“yo”;
Exactly equivalent if 'x' is a simple thing like a pointer/integer, as being discussed. But as discussed here: <http://en.wikipedia.org/wiki/%3F:#C> beware the case of x being an expression and whether it gets evaluated once or more times. Also, the "a = x ? : y;" form is not C, it is a GNU extension. Cheers, -- ____________________________________________________________ Sean McBride, B. Eng s...@rogue-research.com Rogue Research www.rogue-research.com Mac Software Developer Montréal, Québec, Canada _______________________________________________ Cocoa-dev mailing list (Cocoa-dev@lists.apple.com) 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: https://lists.apple.com/mailman/options/cocoa-dev/archive%40mail-archive.com This email sent to arch...@mail-archive.com
