Converting List to Map, Elixir way

Question

I have a function which returns a Map, converted from List(:erlang.memory()). It works as I expected, but it doesn't seem to be beautiful. How can I refine the snippet to more elixir-way(meaning more beautiful logic)?

{{:total, total}, {:processes, processes}, {:processes_used, processes_used}, {:system, system}, {:atom, atom}, {:atom_used, atom_used}, {:binary, binary}, {:code, code}, {:ets, ets}} =
  :erlang.memory()
  |> List.to_tuple()

params = %{
  total: total,
  processes: processes,
}

s3cur3 · Accepted Answer · 2020-04-30 14:06:51Z

9

iex(1)> :erlang.memory()
[total: 20258296, processes: 5377080, processes_used: 5370936, system: 14881216,
 atom: 264529, atom_used: 255982, binary: 72440, code: 6322711, ets: 335736]

iex(2)> :erlang.memory() |> Enum.into(%{})
%{atom: 264529, atom_used: 259196, binary: 149136, code: 6564510, ets: 347720,
  processes: 5518032, processes_used: 5516752, system: 15248920,
  total: 20766952}

Enum.into/2 comes to the rescue.

NB Please refer also to valuable comment by @Dogbert below.

edited Apr 30, 2020 at 14:06

s3cur3

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answered Dec 14, 2016 at 9:17

Aleksei Matiushkin

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2 Comments

Dogbert Over a year ago

For this specific case, there's also |> Map.new.

hykw Over a year ago

Enum.into/2 and Map.new/1 are elegance and Elixir-ish solution. Thank you!!

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