On Sat, 16 Mar 2019 at 06:33, Tim Mackinnon <tim@testit.works> wrote:
> Hi - in my quest to understand the edgier details of Pharo (and Smalltalk)
> - and driven by fresh thoughts of completing exercism exercises - I was
> surprised to find that there is no #excludes: operation on collection to
> mirror the #includes: operation?
>
> I was curious about this - its seems a strange omission?
>
> Of course I can inverse it with not, or do things a different way - but we
> have ifTrue: mirrored with ifFalse, empty/notEmpty so am I missing
> something?
>
> I wanted to write something like
>
>
> aString detect: [:c | ($0 to: $1) excludes: c] ifFound: aBlock. (Evaluate
> a block if the string isn’t all 0 and 1’s)
>
purely off the cuff, if you want the opposite logic what about...
aString detect: [:c | (($0 to: $1) includes: c) not ] ifFound:
aBlock.
Of course I can write this as:
>
> (aString reject: [:c | c = $0 | c = $1)) ifNotEmpty: aBlock
>
cheers -ben
