<html xmlns:v="urn:schemas-microsoft-com:vml" xmlns:o="urn:schemas-microsoft-com:office:office" xmlns:w="urn:schemas-microsoft-com:office:word" xmlns:m="http://schemas.microsoft.com/office/2004/12/omml" xmlns="http://www.w3.org/TR/REC-html40"><head><meta http-equiv=Content-Type content="text/html; charset=utf-8"><meta name=Generator content="Microsoft Word 15 (filtered medium)"><style></style></head><body lang=DE link="#0563C1" vlink="#954F72" style='word-wrap:break-word'><div class=WordSection1>I added something similar to my Values package (VW and ports).<o:p></o:p>The source is<o:p></o:p>SequenceableCollection>>asArgumentsIn: aBlock<o:p></o:p> "Evaluate aBlock with the receiver's elements as parameters.<o:p></o:p> aBlock takes its arguments from the receiver.<o:p></o:p> 'ok'<o:p></o:p> #(1 2 3) asArgumentsIn: [:a :b :c | a + b + c]<o:p></o:p> #(1 2 3) asArgumentsIn: [:a :b | a + b]<o:p></o:p> #(1 2 3) asArgumentsIn: [:a | a]<o:p></o:p> #(1 2 3) asArgumentsIn: [42]<o:p></o:p> 'not ok'<o:p></o:p> #(1 2 3) asArgumentsIn: [:a :b :c :d | a + b + c + d]<o:p></o:p> "<o:p></o:p><o:p> </o:p> ^aBlock cullWithArguments: self asArray<o:p></o:p><o:p> </o:p>The difference is that it takes a list of any size and picks out the first items and binds them to the variables.<o:p></o:p>I use it often for CSV processing like<o:p></o:p> (line tokensBasedOn: $;) asArgumentsIn: [:first :second :y | … ].<o:p></o:p><o:p> </o:p>I am just a bit unhappy with the name – it is too long. It reads ok though.<o:p></o:p>The pipe character is an interesting idea. I have to think about it.<o:p></o:p><o:p> </o:p>I am use it for a while now and I am very happy with it.<o:p></o:p><o:p> </o:p>Happy hacking,<o:p></o:p>Christian<o:p></o:p><o:p> </o:p><o:p> </o:p><div style='border:none;border-top:solid #E1E1E1 1.0pt;padding:3.0pt 0cm 0cm 0cm'>Von: Cuis-dev <cuis-dev-bounces@lists.cuis.st> Im Auftrag von Luciano Notarfrancesco via Cuis-dev Gesendet: Mittwoch, 21. Juni 2023 15:13 An: Discussion of Cuis Smalltalk <cuis-dev@lists.cuis.st> Cc: Luciano Notarfrancesco <luchiano@gmail.com> Betreff: [Cuis-dev] Methods that return multiple values<o:p></o:p></div><o:p> </o:p>Smalltalk doesn’t have a convention for methods returning multiple values, and I’m not aware of any implementation.<o:p></o:p><div>An example of such thing is the extended gcd: ‘a xgcd: b’ returns g, s, t where g is the gcd, and as + bt = g. Writing methods that return multiple values is easy with the curly brackets syntax, Integer>>#xgcd: ends with something like<o:p></o:p></div><div> ^ {g. s. t}<o:p></o:p></div><div>But using sending messages that return multiple values is kind of annoying, I end up doing something like:<o:p></o:p></div><div> xgcd := a xgcd: b.<o:p></o:p></div><div> g := xgcd at: 1.<o:p></o:p></div><div> s := xgcd at: 2.<o:p></o:p></div><div> t := xgcd at: 3<o:p></o:p></div><div>Some years ago I thought about using blocks for this, but I never tried it. Today I just did a little experiment implementing anArray | aBlock as ‘^ aBlock valueWithPossibleArgs: self’ and I can do:<o:p></o:p></div><div> (a xgcd: b) | [:g :s :t| … ]<o:p></o:p></div><div><o:p> </o:p></div><div>This is seems quite nice already, I guess I’ll start using it and see how it feels. But the point of this mail is not to show a solution, but to ask if anyone have thought about this or if they know any nicer solutions. Any ideas?<o:p></o:p></div></div></body></html>