hykw
I have a logic like this. All the modules have the same patterns in their names(Foo.Module_[NUMERIC]). Can I set the module into f more simply like: f = Foo.Module_#{id}; f.get() ?
id = 2
f = case id do
"1" => Foo.Module_1
"2" => Foo.Module_2
"3" => Foo.Module_3
end
f.get()
defmodule Foo.Module_1 do
def get(), do: SOME-LOGICS-HERE
end
defmodule Foo.Module_2 do
def get(), do: SOME-LOGICS-HERE
end
defmodule Foo.Module_3 do
def get(), do: SOME-LOGICS-HERE
end
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vidalraphael
That’s a somewhat unorthodox approach, but it’s possible:
The use of the
String.to_existing_atom/1is necessary because string to atom conversion isn’t safe in Erlang/Elixir, as atoms are not garbage collected, and filling up the atoms table is one of the ways to bring down the BEAM. Since the modules should be defined in the first place, the atoms that reference their names will already exist.Hope it helps you
hykw
It worked perfectly as I expected.
Thank you.