Empathy List Archives

A

ashuan

Fri, Oct 20, 2017 8:29 AM

Hello alls,

I'm a newbie to OpenScad but not to programing language.
I have a blocking point about module return.
I have a look about this forum without finded answer.

I my preferated world, i wish have a syntaxe like this :

module <name> (<parameter1>, <parameter2>, ..., <parameterN>) {
<instruction1>;
<instruction2>;
...
<instructionN>;
<name> = <return value>; // << or return <return value> or result <return value> or ...
}

an example that is useless if it is not to illustrate my purpose :
module inList(searchText, list)
{
resultat = false;
if (len(search(searchText, list)== 0))
{
resultat = true;
}
inList = resultat;
}

Could you help me, please ?

--
Sent from: http://forum.openscad.org/

Hello alls, I'm a newbie to OpenScad but not to programing language. I have a blocking point about module return. I have a look about this forum without finded answer. I my preferated world, i wish have a syntaxe like this : module <name> (<parameter1>, <parameter2>, ..., <parameterN>) { <instruction1>; <instruction2>; ... <instructionN>; <name> = <return value>; // << or return <return value> or result <return value> or ... } an example that is useless if it is not to illustrate my purpose : module inList(searchText, list) { resultat = false; if (len(search(searchText, list)== 0)) { resultat = true; } inList = resultat; } Could you help me, please ? -- Sent from: http://forum.openscad.org/

G

Gadgetmind

Fri, Oct 20, 2017 9:43 AM

On 2017-10-20 09:29, ashuan wrote:

 <name> = <return value>; // << or return <return value> or result <return

value> or ...

All OpenSCAD modules can "return" is geometry.

OpenSCAD functions can return values including vectors and strings, but
coding inside functions is rather different to in modules. You'll
probably want to make heavy use of the let () element, and either the ?
: method of choosing what to return or the new ifelse described here.

https://en.wikibooks.org/wiki/OpenSCAD_User_Manual/WIP#if.2Felse

function inList(searchText, list) =
let ( result = search(searchText, list, 0))
len(result) == 0 ? true : result;

echo ( inList ("a", "abcdabcd") );

Note that the vector returned from search doesn't have the length you might expect if the result isn't found with num_returns_per_match=0, so the example isn't great.

On 2017-10-20 09:29, ashuan wrote: > <name> = <return value>; // << or return <return value> or result <return > value> or ... All OpenSCAD modules can "return" is geometry. OpenSCAD functions can return values including vectors and strings, but coding inside functions is rather different to in modules. You'll probably want to make heavy use of the let () element, and either the ? : method of choosing what to return or the new ifelse described here. https://en.wikibooks.org/wiki/OpenSCAD_User_Manual/WIP#if.2Felse function inList(searchText, list) = let ( result = search(searchText, list, 0)) len(result) == 0 ? true : result; echo ( inList ("a", "abcdabcd") ); Note that the vector returned from search doesn't have the length you might expect if the result isn't found with num_returns_per_match=0, so the example isn't great.

EB

Eric Buijs

Fri, Oct 20, 2017 9:56 AM

OpenSCAD is a functional programming language and contrary to imperative
programming you can't reassign a new value to a variable. Something I
struggled with in the beginning. For better understanding I wrote an short
article on this
http://eribuijs.blogspot.nl/2017/09/openscad-functional-programming.html
http://eribuijs.blogspot.nl/2017/09/openscad-functional-programming.html
. Hopefully it's useful.

In OpenSCAD a module is generally used to define objects but functions
operate on values an return values. So you need a function. Luckily OpenSCAD
already has a built-in function search that we can use in your case. Below
is an example that may be applicable to your situation.

lst = "abcdabcd";
function st_search (st,lst) = (search(st,lst) != []) ? true : false;
echo(st_search("a",lst));

--
Sent from: http://forum.openscad.org/

OpenSCAD is a functional programming language and contrary to imperative programming you can't reassign a new value to a variable. Something I struggled with in the beginning. For better understanding I wrote an short article on this http://eribuijs.blogspot.nl/2017/09/openscad-functional-programming.html <http://eribuijs.blogspot.nl/2017/09/openscad-functional-programming.html> . Hopefully it's useful. In OpenSCAD a *module* is generally used to define objects but *functions* operate on values an return values. So you need a function. Luckily OpenSCAD already has a built-in function search that we can use in your case. Below is an example that may be applicable to your situation. lst = "abcdabcd"; function st_search (st,lst) = (search(st,lst) != []) ? true : false; echo(st_search("a",lst)); -- Sent from: http://forum.openscad.org/

A

ashuan

Fri, Oct 20, 2017 10:07 AM

Thanks for this answer.

--
Sent from: http://forum.openscad.org/

Thanks for this answer. -- Sent from: http://forum.openscad.org/

A

ashuan

Fri, Oct 20, 2017 10:08 AM

Thanks for this answer

--
Sent from: http://forum.openscad.org/

Thanks for this answer -- Sent from: http://forum.openscad.org/

A

ashuan

Fri, Oct 20, 2017 10:08 AM

Thanks for this answer

--
Sent from: http://forum.openscad.org/

Thanks for this answer -- Sent from: http://forum.openscad.org/

NH

nop head

Fri, Oct 20, 2017 11:17 AM

Modules create or transform geometry, they don't return values and can't be
used in expressions. You need a function for that.

function inList(searchText, list) = len(search(searchText, list)) == 0;

On 20 October 2017 at 09:29, ashuan laurent.sass@gmail.com wrote:

Hello alls,

I'm a newbie to OpenScad but not to programing language.
I have a blocking point about module return.
I have a look about this forum without finded answer.

I my preferated world, i wish have a syntaxe like this :

module <name> (<parameter1>, <parameter2>, ..., <parameterN>) {
<instruction1>;
<instruction2>;
...
<instructionN>;
<name> = <return value>; // << or return <return value> or result
<return value> or ...
}

an example that is useless if it is not to illustrate my purpose :
module inList(searchText, list)
{
resultat = false;
if (len(search(searchText, list)== 0))
{
resultat = true;
}
inList = resultat;
}

Could you help me, please ?

--
Sent from: http://forum.openscad.org/

OpenSCAD mailing list
Discuss@lists.openscad.org
http://lists.openscad.org/mailman/listinfo/discuss_lists.openscad.org

Modules create or transform geometry, they don't return values and can't be used in expressions. You need a function for that. function inList(searchText, list) = len(search(searchText, list)) == 0; On 20 October 2017 at 09:29, ashuan <laurent.sass@gmail.com> wrote: > Hello alls, > > I'm a newbie to OpenScad but not to programing language. > I have a blocking point about module return. > I have a look about this forum without finded answer. > > I my preferated world, i wish have a syntaxe like this : > > module <name> (<parameter1>, <parameter2>, ..., <parameterN>) { > <instruction1>; > <instruction2>; > ... > <instructionN>; > <name> = <return value>; // << or return <return value> or result > <return > value> or ... > } > > an example that is useless if it is not to illustrate my purpose : > module inList(searchText, list) > { > resultat = false; > if (len(search(searchText, list)== 0)) > { > resultat = true; > } > inList = resultat; > } > > Could you help me, please ? > > > > > -- > Sent from: http://forum.openscad.org/ > > _______________________________________________ > OpenSCAD mailing list > Discuss@lists.openscad.org > http://lists.openscad.org/mailman/listinfo/discuss_lists.openscad.org >

TV

Tim V. Shaporev

Fri, Oct 20, 2017 11:20 AM

Wow! You know Boolean logic!
As was really desperate looking on "? true : false"
:-|

On 10/20/2017 2:17 PM, nop head wrote:

Modules create or transform geometry, they don't return values and can't
be used in expressions. You need a function for that.

function inList(searchText, list) = len(search(searchText, list)) == 0;

On 20 October 2017 at 09:29, ashuan <laurent.sass@gmail.com
mailto:laurent.sass@gmail.com> wrote:

 Hello alls,

 I'm a newbie to OpenScad but not to programing language.
 I have a blocking point about module return.
 I have a look about this forum without finded answer.

 I my preferated world, i wish have a syntaxe like this :

 module <name> (<parameter1>, <parameter2>, ..., <parameterN>) {
     <instruction1>;
     <instruction2>;
     ...
     <instructionN>;
     <name> = <return value>; // << or return <return value> or
 result <return
 value> or ...
 }

 an example that is useless if it is not to illustrate my purpose :
 module inList(searchText, list)
 {
      resultat = false;
      if (len(search(searchText, list)== 0))
      {
          resultat = true;
      }
      inList = resultat;
 }

 Could you help me, please ?




 --
 Sent from: http://forum.openscad.org/

 _______________________________________________
 OpenSCAD mailing list
 Discuss@lists.openscad.org <mailto:Discuss@lists.openscad.org>
 http://lists.openscad.org/mailman/listinfo/discuss_lists.openscad.org <http://lists.openscad.org/mailman/listinfo/discuss_lists.openscad.org>

OpenSCAD mailing list
Discuss@lists.openscad.org
http://lists.openscad.org/mailman/listinfo/discuss_lists.openscad.org

Wow! You know Boolean logic! As was really desperate looking on "? true : false" :-| On 10/20/2017 2:17 PM, nop head wrote: > Modules create or transform geometry, they don't return values and can't > be used in expressions. You need a function for that. > > function inList(searchText, list) = len(search(searchText, list)) == 0; > > On 20 October 2017 at 09:29, ashuan <laurent.sass@gmail.com > <mailto:laurent.sass@gmail.com>> wrote: > > Hello alls, > > I'm a newbie to OpenScad but not to programing language. > I have a blocking point about module return. > I have a look about this forum without finded answer. > > I my preferated world, i wish have a syntaxe like this : > > module <name> (<parameter1>, <parameter2>, ..., <parameterN>) { > <instruction1>; > <instruction2>; > ... > <instructionN>; > <name> = <return value>; // << or return <return value> or > result <return > value> or ... > } > > an example that is useless if it is not to illustrate my purpose : > module inList(searchText, list) > { > resultat = false; > if (len(search(searchText, list)== 0)) > { > resultat = true; > } > inList = resultat; > } > > Could you help me, please ? > > > > > -- > Sent from: http://forum.openscad.org/ > > _______________________________________________ > OpenSCAD mailing list > Discuss@lists.openscad.org <mailto:Discuss@lists.openscad.org> > http://lists.openscad.org/mailman/listinfo/discuss_lists.openscad.org <http://lists.openscad.org/mailman/listinfo/discuss_lists.openscad.org> > > > > > _______________________________________________ > OpenSCAD mailing list > Discuss@lists.openscad.org > http://lists.openscad.org/mailman/listinfo/discuss_lists.openscad.org >

A

ashuan

Fri, Oct 20, 2017 12:28 PM

Thanks all for your explanation.

I've understand now the positionnement logic of module.

I'll try your 3 examples without success.

For understanding, i've this call :

// variables
modulesActifs = ["verin", "title"]; // vague

// affiche un système de vague coloré
if (inList("vague", modulesActifs))
{
...

--
Sent from: http://forum.openscad.org/

Thanks all for your explanation. I've understand now the positionnement logic of module. I'll try your 3 examples without success. For understanding, i've this call : // variables modulesActifs = ["verin", "title"]; // vague // affiche un système de vague coloré if (inList("vague", modulesActifs)) { ... -- Sent from: http://forum.openscad.org/

A

ashuan

Fri, Oct 20, 2017 2:47 PM

I'm use customizer plugin, it's very nice.

--
Sent from: http://forum.openscad.org/

I'm use customizer plugin, it's very nice. -- Sent from: http://forum.openscad.org/

discuss@lists.openscad.org

Module return