Cool trick! Smalltalk is so cool!! :D
On 08.11.2010, at 17:50, Marcus Denker wrote: > > On Nov 7, 2010, at 5:50 PM, Göran Krampe wrote: > >> On 11/07/2010 08:06 PM, Guillermo Polito wrote: >>> #anySatisfy: does not iterate over the entire collection either. So if >>> you only want to know if there is one that satisfies the condition... >>> this is the message you're looking for. >>> >>> Cheers! >>> Guille >> >> And finally, a generic "trick" for breaking out of loops (not just >> iterations over collections): >> >> Factor out the loop in a single method, then call it. When you want to break >> out, just do a normal return! > > This often even makes the code more readable. > > But speaking of tricks... > > testValueWithExitBreak > > | val | > > [ :break | > 1 to: 10 do: [ :i | > val := i. > i = 4 ifTrue: [break value]. > ] > ] valueWithExit. > > self assert: val = 4. > > > > testValueWithExitContinue > > | val last | > val := 0. > > 1 to: 10 do: [ :i | > [ :continue | > i = 4 ifTrue: [continue value]. > val := val + 1. > last := i > ] valueWithExit. > ]. > > self assert: val = 9. > self assert: last = 10. > > > with > > BlockClosure>>valueWithExit > self value: [ ^nil ] > > > > > > > -- > Marcus Denker -- http://www.marcusdenker.de > INRIA Lille -- Nord Europe. Team RMoD. > >
