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25 lines
683 B
Nix
25 lines
683 B
Nix
{ pkgs, lib, self }:
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{
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/* Count the attributes with the given predicate.
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Examples:
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countAttrs (name: value: value) { d = true; f = true; a = false; }
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=> 2
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countAttrs (name: value: value.enable) { d = { enable = true; }; f = { enable = false; package = [ ]; }; }
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=> 1
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*/
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countAttrs = pred: attrs:
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lib.count (attr: pred attr.name attr.value)
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(lib.mapAttrsToList lib.nameValuePair attrs);
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/* Filters and groups the attribute set into two separate attribute.
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Example:
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filterAttrs' (n: v: v == 4) { a = 4; b = 2; c = 6; }
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=> { ok = { a = 4; }; reject = { b = 2; c = 6; }; }
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*/
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filterAttrs' = f: attrs: { };
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}
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