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gleam_stdlib

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A standard library for the Gleam programming language

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

-module(gleam@map).

-compile([no_auto_import, nowarn_unused_vars]).



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

-export_type([map_/2]).



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



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

size(Map) ->

    maps:size(Map).



-spec to_list(map_(KF, KG)) -> list({KF, KG}).

to_list(Map) ->

    maps:to_list(Map).



-spec from_list(list({KK, KL})) -> map_(KK, KL).

from_list(List) ->

    maps:from_list(List).



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

has_key(Map, Key) ->

    maps:is_key(Key, Map).



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

new() ->

    maps:new().



-spec get(map_(KX, KY), KX) -> {ok, KY} | {error, nil}.

get(From, Get) ->

    gleam_stdlib:map_get(From, Get).



-spec insert(map_(LD, LE), LD, LE) -> map_(LD, LE).

insert(Map, Key, Value) ->

    maps:put(Key, Value, Map).



-spec update(map_(NI, NJ), NI, fun((gleam@option:option(NJ)) -> NJ)) -> map_(NI, NJ).

update(Map, Key, Fun) ->

    _pipe = Map,

    _pipe@1 = get(_pipe, Key),

    _pipe@2 = gleam@option:from_result(_pipe@1),

    _pipe@3 = Fun(_pipe@2),

    insert(Map, Key, _pipe@3).



-spec map_values(map_(LJ, LK), fun((LJ, LK) -> LN)) -> map_(LJ, LN).

map_values(Map, Fun) ->

    maps:map(Fun, Map).



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

keys(Map) ->

    maps:keys(Map).



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

values(Map) ->

    maps:values(Map).



-spec filter(map_(MA, MB), fun((MA, MB) -> boolean())) -> map_(MA, MB).

filter(Map, Property) ->

    maps:filter(Property, Map).



-spec take(map_(MG, MH), list(MG)) -> map_(MG, MH).

take(Map, Desired_keys) ->

    maps:with(Desired_keys, Map).



-spec merge(map_(MN, MO), map_(MN, MO)) -> map_(MN, MO).

merge(Map, New_entries) ->

    maps:merge(Map, New_entries).



-spec delete(map_(MV, MW), MV) -> map_(MV, MW).

delete(Map, Key) ->

    maps:remove(Key, Map).



-spec drop(map_(NB, NC), list(NB)) -> map_(NB, NC).

drop(Map, Disallowed_keys) ->

    case Disallowed_keys of

        [] ->

            Map;



        [X | Xs] ->

            drop(delete(Map, X), Xs)

    end.



-spec do_fold(list({NP, NQ}), NS, fun((NS, NP, NQ) -> NS)) -> NS.

do_fold(List, Initial, Fun) ->

    case List of

        [] ->

            Initial;



        [{K, V} | Rest] ->

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

    end.



-spec fold(map_(NT, NU), NX, fun((NX, NT, NU) -> NX)) -> NX.

fold(Map, Initial, Fun) ->

    _pipe = Map,

    _pipe@1 = to_list(_pipe),

    do_fold(_pipe@1, Initial, Fun).