[squeak-dev] The Inbox: Collections-ct.870.mcz
Nicolas Cellier
nicolas.cellier.aka.nice at gmail.com
Mon Dec 30 17:32:47 UTC 2019
Done
Le lun. 30 déc. 2019 à 15:43, Thiede, Christoph <
Christoph.Thiede at student.hpi.uni-potsdam.de> a écrit :
> Ah, thank you!
>
>
> Then this can be moved to Treated.
> ------------------------------
> *Von:* Squeak-dev <squeak-dev-bounces at lists.squeakfoundation.org> im
> Auftrag von Levente Uzonyi <leves at caesar.elte.hu>
> *Gesendet:* Montag, 30. Dezember 2019 15:27:28
> *An:* squeak-dev at lists.squeakfoundation.org
> *Betreff:* Re: [squeak-dev] The Inbox: Collections-ct.870.mcz
>
> On Mon, 30 Dec 2019, commits at source.squeak.org wrote:
>
> > A new version of Collections was added to project The Inbox:
> > http://source.squeak.org/inbox/Collections-ct.870.mcz
> >
> > ==================== Summary ====================
> >
> > Name: Collections-ct.870
> > Author: ct
> > Time: 30 December 2019, 3:01:24.515602 pm
> > UUID: cb75296c-0850-d440-97a6-fc1962eef672
> > Ancestors: Collections-nice.868
> >
> > Proposal: Refine Dictionary >> #at:ifPresent: not to require an one-arg
> block.
> >
> > Usage example:
> > Smalltalk at: className ifPresent: [self inform: 'Class already
> exists'. ^ nil].
>
> That is what Dictionary >> #includesKey: is for:
>
> (Smalltalk includesKey: className) ifTrue: [self inform: 'Class
> already exists'. ^ nil].
>
> Btw, classes should be looked up with #hasClassNamed::
>
> (Smalltalk hasClassNamed: className) ifTrue: [self inform: 'Class
> already exists'. ^ nil].
>
>
> Levente
>
> >
> > =============== Diff against Collections-nice.868 ===============
> >
> > Item was changed:
> > ----- Method: Dictionary>>at:ifPresent: (in category 'accessing') -----
> > at: key ifPresent: aBlock
> > "Lookup the given key in the receiver. If it is present, answer
> the value of evaluating the given block with the value associated with the
> key. Otherwise, answer nil."
> >
> > | v |
> > v := self at: key ifAbsent: [^ nil].
> > + ^ aBlock cull: v
> > - ^ aBlock value: v
> > !
>
>
>
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