Hello guys, I have a maybe dumb question but I’m trying without success to merge 2 maps with nested values %{"XX" => %{"A" => 1}} %{"XX" => %{"B" => 3}, "YY" => %{"A" => 2}} and the expected result is %{"XX" => %{"A" => 1, "B" => 3}, "YY" => %{"A" => 2}} but map1 |> Map.merge(map2) only merge th…

You need to use Map.merge/3 and provide a conflict handler that handles the conflicts recursively.

Awesome solved with result = ma1 |> Map.merge(map2, fn _k, v1, v2 -> v1 |> Map.merge(v2) end) ty so much @NobbZ !!

I was looking for information on maps that might have more nesting and couldn’t find anything. I came up with this and hope it helps others also searching for that: def merge_nested(map1, map2) do Map.merge(map1, map2, &merge_nested/3) end def merge_nested(_k, %{} = v1, %{} = v2) do Map.merge(…

Merging 2 nested maps

Questions & Help Questions

axelson April 30, 2022, 7:25pm 5

You may also be interested in deep_merge:

https://github.com/PragTob/deep_merge