I have been working at putting Gambas on the map at Rosetta Code. http://rosettacode.org/wiki/Rosetta_Code I have 'solved' over 100 of their 'tasks'. There are still lots to do so why not have a go yourself.

These are the Gambas tasks 'solved' http://rosettacode.org/wiki/Category:Gambas

These are the Gambas tasks that need doing http://rosettacode.org…not_implemented_in_Gambas

It can be fun. Give it a go!

You know you can get permalinks by clicking the "Gist" button at https://gambas-playground.proko.eu/ ? That way you can skip the "copy/paste" step.

You know you can get permalinks by clicking the "Gist" button

I am aware of this but it was hard enough getting the link in. Every time I had to prove I was not a robot! I have completed 142 of the challenges of which 91 will run in the 'Playground' so it took some time to add the link to these anyway.

I see!

OK I have started adding Gists, I didn't realise it was this easy.
The 'A's are done e.g. http://rosettacode.org/wiki/Align_columns#Gambas

 I was looking through the Tasks on RosettaCode, and  one called 'Repeat' caught my interest: one procedure has to be passed to another and be execute N number of times. It got me thinking: Is there a concept of a 'Delegate' in Gambas, or a way to pass a pointer to a procedure, and then reference it in the destination to execute it? Note that we are not talking about external libraries but just within one class / module, for the purpose of simplicity.

sjsepan said

…Is there a concept of a 'Delegate' in Gambas, or a way to pass a pointer to a procedure, and then reference it in the destination to execute it? …

Hi Steve, not sure what you have in mind to do with a pointer, or how this relates to the "Repeat" task.

But would using ByRef do what you wanted to do?

Maybe give us an example (…or write a pseudoCode example).

You may be interested in this: http://gambas.8142.n7.nabble.com/Callback-td6163.html

…and this: http://gambas.8142.n7.nabble.com/ByRef-td18173.html

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BTW, for Rosetta Repeat, I just copied the VBA example & tweaked it:-


…but I guess that is not in the spirit of the project.

 OK, I've just been reading about "Delegates" in Visual Basic, so I don't think my answer above is very helpful…sorry.

Just for completeness, I think this is a valid (but crude) example of passing pointers;


It allocates some memory just big enough for an integer, then sets an initial value…just need a form, 2 buttons, a textbox & a label.

stevedee,
The example of pointers is appreciated nonetheless – didn't see any robust examples elsewhere yet. Thanks!
I did try ByRef the other day in the hope it would make a difference, but no.
Delegates are an interesting and powerful feature, so I hope something like it makes it into Gambas some day. As this was only for one of the RosettaCode task candidates, its not a showstopper, but its a good way to learn whether I know Gambas as well as I 'd like to think I do. ;-) Still have a way to go…

Steve
PS – just saw the Nabble links. Looks like tobias-47 was on a similar quest. Will read through it and see what was discussed – Thanks!!

stevedee said

Just for completeness, I think this is a valid (but crude) example of passing pointers;

UPDATE: well the Nabble links got me far enoguh to submit a Gambas item, but with caveats noted in the description:
http://rosettacode.org/wiki/Repeat#Gambas
In case they flag it for not closely enough meeting the specs, I am posting the code here too: