Elixir - Convert List into a Map

You can avoid the extra call to Enum.map/2, and build the new map directly using Map.new/2:

[1,2,3,4]
|> Enum.chunk_every(2)
|> Map.new(fn [k, v] -> {k, v} end)

^{Update: The previous version of this answer used chunk/2 but that has been deprecated in favor of chunk_every/2.}

You can use Enum.chunk_every/2:

[1, 2, 3, 4] 
  |> Enum.chunk_every(2) 
  |> Enum.map(fn [a, b] -> {a, b} end) 
  |> Map.new

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