<div dir="auto">Ah, great, I like this! Thanks!</div><div> <div class="gmail_quote"><div dir="ltr" class="gmail_attr">On Wed, 21 Jun 2023 at 16:08 Juan Vuletich <<a href="mailto:juan@cuis.st">juan@cuis.st</a>> wrote: </div><blockquote class="gmail_quote" style="margin:0px 0px 0px 0.8ex;border-left-width:1px;border-left-style:solid;padding-left:1ex;border-left-color:rgb(204,204,204)">Hi Luciano, The style I learn from Squeak long time ago is to receive a block and evaluate it with the values that would be answered. In your example it would be a xgcd: b into: [ :g :s :t | ... ] It is very similar to what you propose, but it avoids creating an extra array. See, for example, senders of #barycentricCoordinatesInTriangle:with:with:into:ifDegenerate: and #nextUtf8BytesAndCodePointInto:into: This style doesn't require any additions to the image and is expressive enough in my opinion. Cheers, On 6/21/2023 10:13 AM, Luciano Notarfrancesco via Cuis-dev wrote: > Smalltalk doesn’t have a convention for methods returning multiple > values, and I’m not aware of any implementation. > 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 > ^ {g. s. t} > But using sending messages that return multiple values is kind of > annoying, I end up doing something like: > xgcd := a xgcd: b. > g := xgcd at: 1. > s := xgcd at: 2. > t := xgcd at: 3 > 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: > (a xgcd: b) | [:g :s :t| … ] > > 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? -- Juan Vuletich <a href="http://cuis.st" rel="noreferrer" target="_blank">cuis.st</a> <a href="http://github.com/jvuletich" rel="noreferrer" target="_blank">github.com/jvuletich</a> <a href="http://researchgate.net/profile/Juan-Vuletich" rel="noreferrer" target="_blank">researchgate.net/profile/Juan-Vuletich</a> <a href="http://independent.academia.edu/JuanVuletich" rel="noreferrer" target="_blank">independent.academia.edu/JuanVuletich</a> <a href="http://patents.justia.com/inventor/juan-manuel-vuletich" rel="noreferrer" target="_blank">patents.justia.com/inventor/juan-manuel-vuletich</a> <a href="http://linkedin.com/in/juan-vuletich-75611b3" rel="noreferrer" target="_blank">linkedin.com/in/juan-vuletich-75611b3</a> <a href="http://twitter.com/JuanVuletich" rel="noreferrer" target="_blank">twitter.com/JuanVuletich</a> </blockquote></div></div>