Aug. 29, 2011
11:28 a.m.
On 29.08.2011, at 18:14, DeNigris Sean wrote:
What is the purpose of #haltIf: aBlock?
Right now, you can pass any of the following to Object>>haltIf: - aBlock taking an optional argument which is automatically set to the receiver of #halt - aSelector which looks up the call chain and halts if present - aBoolean
So, whatever the condition is, it seems like you should be able to evaluate it in the calling context. When would you ever need to use a block? Can we eliminate the block behavior? Or, who has a great war story about blocks saving them from imminent doom...
It's useful for testing an intermediate result, without having to declare another temp. E.g.: ^ foo bar + fum becomes ^ (foo bar haltIf: [:x | x > 42]) + fum - Bert -