Hi,
I want to deside what to show/render and I used a string variable to
have clear description. And I have "both" as part of the variant
what should something more. So every object should be visible with its
own name and "both". I decided to use logical OR. But the comparison
makes an error I don't know yet.

Let me give you this example. I use only view="body" and true/false tool
to show the logic.

// scad

view = "body";
echo(view_check =  view);

view_check1 = (view == "bla" || "both") ? true : false ;
echo (view_check1 = view_check1);
// this echo should say false because both strings are wrong

view_check2 = (view == ("body" || "both")) ? true : false ;
echo (view_check2 = view_check2);
// this echo should be true because view = "body" is true

// end of scad

The result of echos is confusing:

ECHO: view_check = "body"

ECHO: view_check1 = true

ECHO: view_check2 = false

The first echo is just to see the correct input.
The second one should be false because no "bla" and no "both" is
there, but it is true ?
The third echo should be true because "body" is one true option, but
it is false ?

The difference between view_check1 and 2 is, that I added a bracket in
order to get rid of the error but it made the confusion worse..

Can you explain me what I'm doing wrong and how to do the comparison
correctly?

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

Hi,
I want to deside what to show/render and I used a string variable to have
clear description. And I have "both" as part of the variant what should
something more. So every object should be visible with its own name and
"both". I decided to use logical OR. But the comparison makes an error I
don't know yet.

Let me give you this example. I use only view="body" and true/false tool
to show the logic.

// scad

view = "body";
echo(view_check =  view);

view_check1 = (view == "bla" || "both") ? true : false ;
echo (view_check1 = view_check1);
// this echo should say false because both strings are wrong

view_check2 = (view == ("body" || "both")) ? true : false ;
echo (view_check2 = view_check2);
// this echo should be true because view = "body" is true

// end of scad

The result of echos is confusing:

ECHO: view_check = "body"

ECHO: view_check1 = true

ECHO: view_check2 = false

The first echo is just to see the correct input.
The second one should be false because no "bla" and no "both" is there, but
it is true ?
The third echo should be true because "body" is one true option, but
it is false ?

The difference between view_check1 and 2 is, that I added a bracket in
order to get rid of the error but it made the confusion worse..

Can you explain me what I'm doing wrong and how to do the comparison
correctly?

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

Hi,
I want to deside what to show/render and I used a string variable to have
clear description. And I have "both" as part of the variant what should
something more. So every object should be visible with its own name and
"both". I decided to use logical OR. But the comparison makes an error I
don't know yet.

Let me give you this example. I use only view="body" and true/false tool
to show the logic.

// scad

view = "body";
echo(view_check =  view);

view_check1 = (view == "bla" || "both") ? true : false ;
echo (view_check1 = view_check1);
// this echo should say false because both strings are wrong

view_check2 = (view == ("body" || "both")) ? true : false ;
echo (view_check2 = view_check2);
// this echo should be true because view = "body" is true

// end of scad

The result of echos is confusing:

ECHO: view_check = "body"

ECHO: view_check1 = true

ECHO: view_check2 = false

The first echo is just to see the correct input.
The second one should be false because no "bla" and no "both" is there, but
it is true ?
The third echo should be true because "body" is one true option, but
it is false ?

The difference between view_check1 and 2 is, that I added a bracket in
order to get rid of the error but it made the confusion worse..

Can you explain me what I'm doing wrong and how to do the comparison
correctly?

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