Hi all,
after reading the topic at
http://stackoverflow.com/questions/33851536/how-do-you-define-constants-in-elixir-modules
I decided to use the approach taken by wxErlang. I found this to be a
little verbose, especially since I also needed a list of all constants and
an easy way to convert from the integer value to the associated atom.
So I created the const package, which allows you to write this:
defmodule Status do
use Const, [:queued, :processed, :sent]
end
and obtain this
defmodule Status do
def queued, do: 0
def processed, do: 1
def sent, do: 2
def all, do: [queued: 0, processed: 1, sent: 2]
def by_value(val) do
# returns the atom from the integer value. In case of duplicated
values, the fist
# associated atom is returned
end
end
You can also give a keyword list if you need specific values, and even a
list where some elements are just atoms and some are tuples. The behavior
in this case will be like for C enums.
More details at: https://github.com/bitgamma/const
Hope it can be useful!
Regards,
Michele Balistreri
Bitgamma OÜ
--
You received this message because you are subscribed to the Google Groups
"elixir-lang-talk" group.
To unsubscribe from this group and stop receiving emails from it, send an email
to [email protected].
To view this discussion on the web visit
https://groups.google.com/d/msgid/elixir-lang-talk/76121992-3a22-4211-8032-6ed997247349%40googlegroups.com.
For more options, visit https://groups.google.com/d/optout.
