Get all Map keys

Question

Is there a way in elixir to get all of the map keys similar to array_keys in PHP? I have been searching but cannot seem to find a way.

Or is there another way to get unique values? I am assigning names to keys in the map with a value of 1 to get only distinct values. Then I would like to get the keys to only retrieve the unique values.

I am using this code to create my map:

names = Enum.reduce lines, %{}, fn line, acc ->
  Map.put(acc, line.name, 1)
end

For example, I have two lines with line.name as test. I would want the end result to return just test. Or if they are different return them separately, then use something like enum.join to combine them

Enum.join(names, " - ")

Answer 1

You can use Map.keys/1:

map = %{a: 1, b: 2}
Map.keys(map)
#=> [:a, :b]