Efficient way to filter a Map by value in Elixir

Question

In Elixir, what would be an efficient way to filter a Map by its values.

Right now I have the following solution

%{foo: \"bar\", biz: ni         


        

Answer 1

In this case comprehension would be a good idea, because it also does not create an intermediate list and returns you a map:

map = %{baz: 4, biz: nil, foo: "bar"}
for {key, value} <- map, !is_nil(value), into: %{}, do: {key, value}