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On Saturday, February 26, 2022 at 3:24:21 AM UTC+1 qh...@pnq.cc wrote:
> I've found myself repeatedly need to replace some key name in the map.
>
> For example, to change the key name from "_id" to "id":
>
> data = fetch_some_data_from_db()
> {id, data} = Map.pop(data, "_id")
> data |> Map.put(data, "id", id)
>
> It gets messy when the target is deeply nested.
>
> To help deal with it, I wrote two util functions:
>
> defp replace_key_in(data, [old_name], new_name),
> do: replace_key(data, old_name, new_name)
>
> defp replace_key_in(data, [_ | _] = path, new_name) do
> {path, [old_name]} = Enum.split(path, -1)
>
> update_in(
> data,
> path,
> &replace_key(&1, old_name, new_name)
> )
> end
>
> defp replace_key(data, old_name, new_name) do
> {value, rest} = Map.pop(data, old_name)
> Map.put(rest, new_name, value)
> end
>
> Do you think we can add it to the Map module?
>
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