30 lines
1008 B
Nix
30 lines
1008 B
Nix
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{ pkgs ? import <nixpkgs> { }
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, lib ? inputs.pkgs.lib
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, ...
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}@inputs:
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builtins // rec {
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mod = base: int: base - (int * (builtins.div base int));
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map_ = list: fn: (builtins.map fn list);
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mapAttrs_ = attrset: fn: (builtins.mapAttrs fn attrset);
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# :: [T] -> (T -> null | V) -> [V]
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# Filters if return null, otherwise, remap to V
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filterMap_ = list: fn: (builtins.filter (e: e != null) (builtins.map fn list));
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filterMap = fn: list: (filterMap_ list fn);
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filter_ = list: fn: (builtins.filter fn list);
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# :: [T] -> (T -> V) -> {T[int] = V;}
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list2Attrs_ = list: fn_k_v (builtins.foldl' (acc: k: acc // { k = (fn_k_v k); }) { } list);
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list2Attrs = fn_k_v: list (list2Attrs_ list fn_k_v);
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# range :: int -> int -> [int]
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rangeIn = lib.range;
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rangeEx = start: stop: (lib.range start stop-1);
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# [T] -> int
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len = builtins.length;
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zip = lib.zipLists;
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# [T] -> [{idx: int, val: T}]
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enumerate = list: lib.zipListsWith (idx: val: { inherit idx val; }) (rangeEx 0 (len list)) list;
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}
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