Hello Christian,

the hint to Lisp is obvious. In Clojure (a modern Lisp-Dialect) destructuring (https://clojure.org/guides/destructuring) is used a lot.

Johannes
Am 28.03.2020 um 15:23 schrieb Christian Haider <christian.haider@smalltalked-visuals.com>:

I chose the name because of the old Lisp ���destructuring-bind���. But this is more powerful, because it does tree matching. This is just shallow.
I am not sure where the concept was invented first. It may have been Lisp.
 
 
Von: Norbert Hartl <norbert@hartl.name> 
Gesendet: Samstag, 28. M��rz 2020 14:20
An: Mark Plas <mark.plas@mediagenix.tv>
Cc: Christian Haider <christian.haider@smalltalked-visuals.com>; vwnc@cs.uiuc.edu; esug-list@lists.esug.org; amber-lang@googlegroups.com
Betreff: Re: [Esug-list] destructDo:
 
I think the name destructDo: comes from destructuring assignment. 
 
 
Norbert


Am 28.03.2020 um 14:15 schrieb Mark Plas <mark.plas@mediagenix.tv>:
 
Hello Christian,
 
" I don���t really like the name,"
 
Maybe you could call it #tupleDo:?
 
                #(1 2 3) tupleDo: [:a :b :c | ���]
 
Mark
 
 
Mark Plas
Software Engineer
T +32 2 467 34 30
 
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From: Esug-list <esug-list-bounces@lists.esug.org> On Behalf Of Christian Haider
Sent: zaterdag 28 maart 2020 13:43
To: vwnc@cs.uiuc.edu; esug-list@lists.esug.org; amber-lang@googlegroups.com
Subject: [Esug-list] destructDo:
 
Hi,
 
I am using a nice little method #destructDo: for a while now and it feels good.
In VisualWorks:
SequenceableCollection>>destructDo: aBlock
                                "Evaluate aBlock with the receiver's elements as parameters.
                                aBlock takes its arguments from the receiver.
                                'ok'
                                #(1 2 3) destructDo: [:a :b :c | a + b + c]
                                #(1 2 3) destructDo: [:a :b | a + b]
                                #(1 2 3) destructDo: [:a | a]
                                #(1 2 3) destructDo: [42]
                                'not ok'
                                #(1 2 3) destructDo: [:a :b :c :d | a + b + c + d]
                                "
                                ^aBlock cullWithArguments: self asArray
 
In Amber: 
SequenceableCollection>>destructDo: aBlock
                                ^aBlock valueWithPossibleArguments: self
 
In Pharo and other dialects, I don���t know, but should be as easy.
 
For example you can do
                (('2020-03-28' tokensBasedOn: $-) collect: #asNumber) destructDo: [:year :month :day |
                               Date newDay: day monthNumber: month year: year]
 
I like that the block is not the receiver (like with #valueWithArguments or #cullWithArguments), but the last argument.
 
Now the questions:
  • I am sure that others came up with this. Anybody knows?
  • What are you using for this pattern?
  • I don���t really like the name, but haven���t found anything better yet. Maybe #destructedDo: or just #destructed: or: #withPartsDo:��� maybe something shorter? Ideas?
  • What are you thinking about this?
 
Happy hacking,
                Christian
 
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