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gleam_stdlib

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A standard library for the Gleam programming language

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gleam_stdlib gen src gleam@map.erl
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gen/src/gleam@map.erl 

-module(gleam@map).

-compile(no_auto_import).



-export([size/1, to_list/1, from_list/1, has_key/2, new/0, get/2, insert/3, map_values/2, keys/1, values/1, filter/2, take/2, merge/2, delete/2, drop/2, update/3, fold/3]).

-export_type([map_/2]).



-type map_(Key, Value) :: any() | {gleam_phantom, Key, Value}.



-spec size(map_(any(), any())) -> integer().

size(A) ->

    maps:size(A).



-spec to_list(map_(CMT, CMU)) -> list({CMT, CMU}).

to_list(A) ->

    maps:to_list(A).



-spec from_list(list({CMY, CMZ})) -> map_(CMY, CMZ).

from_list(A) ->

    maps:from_list(A).



-spec has_key(map_(CNH, any()), CNH) -> boolean().

has_key(Map, Key) ->

    maps:is_key(Key, Map).



-spec new() -> map_(any(), any()).

new() ->

    maps:new().



-spec get(map_(CNS, CNP), CNS) -> {ok, CNP} | {error, nil}.

get(A, B) ->

    gleam_stdlib:map_get(A, B).



-spec insert(map_(COB, COC), COB, COC) -> map_(COB, COC).

insert(Map, Key, Value) ->

    maps:put(Key, Value, Map).



-spec map_values(map_(COP, COQ), fun((COP, COQ) -> COT)) -> map_(COP, COT).

map_values(Map, Fun) ->

    maps:map(Fun, Map).



-spec keys(map_(COW, any())) -> list(COW).

keys(A) ->

    maps:keys(A).



-spec values(map_(any(), CPB)) -> list(CPB).

values(A) ->

    maps:values(A).



-spec filter(map_(CPM, CPN), fun((CPM, CPN) -> boolean())) -> map_(CPM, CPN).

filter(Map, Property) ->

    maps:filter(Property, Map).



-spec take(map_(CPZ, CQA), list(CPZ)) -> map_(CPZ, CQA).

take(Map, Desired_keys) ->

    maps:with(Desired_keys, Map).



-spec merge(map_(CQG, CQH), map_(CQG, CQH)) -> map_(CQG, CQH).

merge(A, B) ->

    maps:merge(A, B).



-spec delete(map_(CQU, CQV), CQU) -> map_(CQU, CQV).

delete(Map, Key) ->

    maps:remove(Key, Map).



-spec drop(map_(CRA, CRB), list(CRA)) -> map_(CRA, CRB).

drop(Map, Disallowed_keys) ->

    gleam@list:fold(Disallowed_keys, Map, fun(Key, Acc) -> delete(Acc, Key) end).



-spec update(map_(CRH, CRI), CRH, fun(({ok, CRI} | {error, nil}) -> CRI)) -> map_(CRH, CRI).

update(Map, Key, Fun) ->

    insert(Map, Key, Fun(gleam_stdlib:map_get(Map, Key))).



-spec do_fold(list({CRP, CRQ}), CRS, fun((CRP, CRQ, CRS) -> CRS)) -> CRS.

do_fold(List, Initial, Fun) ->

    case List of

        [] ->

            Initial;



        [{K, V} | Tail] ->

            do_fold(Tail, Fun(K, V, Initial), Fun)

    end.



-spec fold(map_(CRT, CRU), CRX, fun((CRT, CRU, CRX) -> CRX)) -> CRX.

fold(Map, Initial, Fun) ->

    do_fold(maps:to_list(Map), Initial, Fun).