For this behavior I think you'd be better of using `map[key] || default_value`, or even `Map.get(map, key) || default_value`. Docs for `Map.get/3` are pretty clear about when it returns default value.
-------- Original Message -------- On 22 Jun 2022, 14:25, Nganga Mburu wrote: > I've found myself and seen others expecting to receive the default value from > `Map.get/3` when the value is `nil`. > > An example is: > `Map.get(%{name: nil}, :name, "John")` > > Expected it to return "John" but it returns `nil` > > My thinking is since the default value is for the key then when the key value > is `nil` we should be able to get the default value. > > The change in code could be as below: > ``` > def get(map, key, default \\ nil) do > case map do > %{^key => value} when is_nil(value) -> > default > > %{^key => value} -> > value > > %{} -> > default > > other -> > :erlang.error({:badmap, other}, [map, key, default]) > end > end > ``` > > -- > You received this message because you are subscribed to the Google Groups > "elixir-lang-core" group. > To unsubscribe from this group and stop receiving emails from it, send an > email to elixir-lang-core+unsubscr...@googlegroups.com. > To view this discussion on the web visit > [https://groups.google.com/d/msgid/elixir-lang-core/9d31c830-8005-4a76-a1f9-dbea2d841ea4n%40googlegroups.com](https://groups.google.com/d/msgid/elixir-lang-core/9d31c830-8005-4a76-a1f9-dbea2d841ea4n%40googlegroups.com?utm_medium=email&utm_source=footer). -- You received this message because you are subscribed to the Google Groups "elixir-lang-core" group. To unsubscribe from this group and stop receiving emails from it, send an email to elixir-lang-core+unsubscr...@googlegroups.com. To view this discussion on the web visit https://groups.google.com/d/msgid/elixir-lang-core/Vn4lCPxz8hge1GGBTOw5gKy_9JfNcg4Zau0qqixm43Qjl73cEetpnKkhjYaadr9tUNRnBCBXiCeesQRjUSbXT9OXNuwHXXLL7k3rZ6STH3Y%3D%40pm.me.