Common data transform patterns - please add yours!

[gregvaughn]

@peerreynders

The original complaint was that there should be a Map.map/2 that produces a Map

That’s basically what Map.new/2 does. I don’t feel like it gets the attention it deserves, and that probably has to do with the choice/tradeoffs made in the Enum module.

[peerreynders]

@gregvaughn

I don’t feel like it gets the attention it deserves

With a name like that it wouldn’t and into %{} diverts attention from Map.new/1.

iex(1)> i = %{a: "hello", b: "world"}
%{a: "hello", b: "world"}
iex(2)> o = Map.new(i, fn ({k,v}) -> {k,String.upcase(v)} end)
%{a: "HELLO", b: "WORLD"}
iex(3)>