How do I list all shell variables in IEx?

Question

I can't figure out how to view my current context in IEx. I want to see a list of all the variable that have been defined in the shell. Is this possible? Thanks.

Divinadivination

Answer 1

You can get the current variables and their values with binding()

e.g.

iex(1)> a = 2
2
iex(2)> b = %{c: 3}
%{c: 3}
iex(3)> binding()
[a: 2, b: %{c: 3}]

See h binding in IEx for more info.

Ope

And something like Enum.map(binding(), fn {k, _v} -> k end) or Keyword.keys(binding()) will get you just the variables names (as atoms). – Brahui

Answer 2

Apart from binding/0, you can also use __ENV__.vars.

More info:

• Macro.Env — Elixir v1.9.2

Brahui