NixでObject.entries().map()
https://github.com/NixOS/nixpkgs/blob/d66d12d43f858181f34f8ce1116166c596b737f3/lib/attrsets.nix#L355
code:mapAttrsToList.nix
a = lib.attrsets.mapAttrsToList (name:value: name+value) {x="a";y="b"}
実行結果は
["xa","yb"]
#Nix