Empathy List Archives

JD

Jerry Davis

Mon, Jul 17, 2017 2:54 PM

I have been trying to figure out a clean way of doing this:

lets say I have 2 variables. The premise is that when one of them is set to
true, the other has to be set to false and vice versa.

So functionally:

a = true;
b = false;

is there a function or module that can be written, such that if a is set to
true, then b will be set to false? and if a is set to false, b will be set
to true?

or do I have to always visually check?

--
Extra Ham Operator: K7AZJ
Registered Linux User: 275424
Raspberry Pi and Openscad developer

The most exciting phrase to hear in science - the one that heralds new
discoveries - is not "Eureka!" but "That's funny...".- Isaac. Asimov

I have been trying to figure out a clean way of doing this: lets say I have 2 variables. The premise is that when one of them is set to true, the other has to be set to false and vice versa. So functionally: a = true; b = false; is there a function or module that can be written, such that if a is set to true, then b will be set to false? and if a is set to false, b will be set to true? or do I have to always visually check? -- Extra Ham Operator: K7AZJ Registered Linux User: 275424 Raspberry Pi and Openscad developer *The most exciting phrase to hear in science - the one that heralds new discoveries - is not "Eureka!" but "That's funny...".*- Isaac. Asimov

NH

nop head

Mon, Jul 17, 2017 2:56 PM

b = !a;

On 17 July 2017 at 15:54, Jerry Davis jdawgaz@gmail.com wrote:

I have been trying to figure out a clean way of doing this:

lets say I have 2 variables. The premise is that when one of them is set
to true, the other has to be set to false and vice versa.

So functionally:

a = true;
b = false;

is there a function or module that can be written, such that if a is set
to true, then b will be set to false? and if a is set to false, b will be
set to true?

or do I have to always visually check?

--
Extra Ham Operator: K7AZJ
Registered Linux User: 275424
Raspberry Pi and Openscad developer

The most exciting phrase to hear in science - the one that heralds new
discoveries - is not "Eureka!" but "That's funny...".- Isaac. Asimov

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

b = !a; On 17 July 2017 at 15:54, Jerry Davis <jdawgaz@gmail.com> wrote: > I have been trying to figure out a clean way of doing this: > > lets say I have 2 variables. The premise is that when one of them is set > to true, the other has to be set to false and vice versa. > > So functionally: > > a = true; > b = false; > > is there a function or module that can be written, such that if a is set > to true, then b will be set to false? and if a is set to false, b will be > set to true? > > or do I have to always visually check? > > > -- > Extra Ham Operator: K7AZJ > Registered Linux User: 275424 > Raspberry Pi and Openscad developer > > > *The most exciting phrase to hear in science - the one that heralds new > discoveries - is not "Eureka!" but "That's funny...".*- Isaac. Asimov > > _______________________________________________ > OpenSCAD mailing list > Discuss@lists.openscad.org > http://lists.openscad.org/mailman/listinfo/discuss_lists.openscad.org > >

W

Whosawhatsis

Mon, Jul 17, 2017 7:45 PM

b = !a is the simplest solution in this specific case. More generally, you
can use the ternary operator to set variables conditionally. For an (overly
verbose) example:

b = (a == true) ? false : true;

On July 17, 2017 at 07:55:20, Jerry Davis (jdawgaz@gmail.com) wrote:

I have been trying to figure out a clean way of doing this:

lets say I have 2 variables. The premise is that when one of them is set to
true, the other has to be set to false and vice versa.

So functionally:

a = true;
b = false;

is there a function or module that can be written, such that if a is set to
true, then b will be set to false? and if a is set to false, b will be set
to true?

or do I have to always visually check?

--
Extra Ham Operator: K7AZJ
Registered Linux User: 275424
Raspberry Pi and Openscad developer

The most exciting phrase to hear in science - the one that heralds new
discoveries - is not "Eureka!" but "That's funny...".- Isaac. Asimov

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

b = !a is the simplest solution in this specific case. More generally, you can use the ternary operator to set variables conditionally. For an (overly verbose) example: b = (a == true) ? false : true; On July 17, 2017 at 07:55:20, Jerry Davis (jdawgaz@gmail.com) wrote: I have been trying to figure out a clean way of doing this: lets say I have 2 variables. The premise is that when one of them is set to true, the other has to be set to false and vice versa. So functionally: a = true; b = false; is there a function or module that can be written, such that if a is set to true, then b will be set to false? and if a is set to false, b will be set to true? or do I have to always visually check? -- Extra Ham Operator: K7AZJ Registered Linux User: 275424 Raspberry Pi and Openscad developer *The most exciting phrase to hear in science - the one that heralds new discoveries - is not "Eureka!" but "That's funny...".*- Isaac. Asimov _______________________________________________ OpenSCAD mailing list Discuss@lists.openscad.org http://lists.openscad.org/mailman/listinfo/discuss_lists.openscad.org

discuss@lists.openscad.org

is there a way to set one variable based on another in a module or function?