[erlang-questions] Process scope variable

Dmytro Lytovchenko dmytro.lytovchenko@REDACTED
Tue Feb 17 14:58:31 CET 2015

You're asking for trouble here -- global variables will complicate your
code and bring in hard to track errors. On the other hand, carrying few
variables in parameters or carrying a state record will make changes
performed by your code very much visible and easy to track using only your

But anyway, if you very much want that -- process global variables can be
set by erlang:put() and can be read by erlang:get(). Enjoy your heisenbugs.

On Tue, Feb 17, 2015 at 2:55 PM, Imants Cekusins <imantc@REDACTED> wrote:

> Does anyone see any benefit from process scope variables?
> E.g.
> a()->
>  A = 10,
> b().
> b()->
> B = A + 1.
> If unset variable is referenced, an error is raised.
> If set process variable is assigned to (and does not pattern match),
> an error is raised.
> This way, there is no need to pass a bunch of static variables around.
> ?
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