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author | sefidel <contact@sefidel.net> | 2023-03-29 20:54:19 +0900 |
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committer | sefidel <contact@sefidel.net> | 2023-04-03 18:32:29 +0900 |
commit | ce06f43476863da90dc60dcee606d2b6c5a89a8e (patch) | |
tree | 5d14946330cb09ff0ebd97bee59407fccee4d860 /lib/attrs.nix | |
download | infra-ce06f43476863da90dc60dcee606d2b6c5a89a8e.tar.gz infra-ce06f43476863da90dc60dcee606d2b6c5a89a8e.zip |
project: initial commit
Diffstat (limited to 'lib/attrs.nix')
-rw-r--r-- | lib/attrs.nix | 26 |
1 files changed, 26 insertions, 0 deletions
diff --git a/lib/attrs.nix b/lib/attrs.nix new file mode 100644 index 0000000..0f8ebd1 --- /dev/null +++ b/lib/attrs.nix @@ -0,0 +1,26 @@ +{ lib, ... }: + +with builtins; +with lib; +rec { + # attrsToList + attrsToList = attrs: + mapAttrsToList (name: value: { inherit name value; }) attrs; + + # mapFilterAttrs :: + # (name -> value -> bool) + # (name -> value -> { name = any; value = any; }) + # attrs + mapFilterAttrs = pred: f: attrs: filterAttrs pred (mapAttrs' f attrs); + + # Generate an attribute set by mapping a function over a list of values. + genAttrs' = values: f: listToAttrs (map f values); + + # anyAttrs :: (name -> value -> bool) attrs + anyAttrs = pred: attrs: + any (attr: pred attr.name attr.value) (attrsToList attrs); + + # countAttrs :: (name -> value -> bool) attrs + countAttrs = pred: attrs: + count (attr: pred attr.name attr.value) (attrsToList attrs); +} |