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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).



-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(Map) ->

    maps:size(Map).



-spec to_list(map_(AUK, AUL)) -> list({AUK, AUL}).

to_list(Map) ->

    maps:to_list(Map).



-spec from_list(list({AUU, AUV})) -> map_(AUU, AUV).

from_list(List) ->

    maps:from_list(List).



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

has_key(Map, Key) ->

    maps:is_key(Key, Map).



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

new() ->

    maps:new().



-spec get(map_(AVU, AVV), AVU) -> {ok, AVV} | {error, nil}.

get(From, Get) ->

    gleam_stdlib:map_get(From, Get).



-spec insert(map_(AWG, AWH), AWG, AWH) -> map_(AWG, AWH).

insert(Map, Key, Value) ->

    maps:put(Key, Value, Map).



-spec map_values(map_(AWS, AWT), fun((AWS, AWT) -> AWW)) -> map_(AWS, AWW).

map_values(Map, Fun) ->

    maps:map(Fun, Map).



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

keys(Map) ->

    maps:keys(Map).



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

values(Map) ->

    maps:values(Map).



-spec filter(map_(AYA, AYB), fun((AYA, AYB) -> boolean())) -> map_(AYA, AYB).

filter(Map, Property) ->

    maps:filter(Property, Map).



-spec take(map_(AYM, AYN), list(AYM)) -> map_(AYM, AYN).

take(Map, Desired_keys) ->

    maps:with(Desired_keys, Map).



-spec merge(map_(AZA, AZB), map_(AZA, AZB)) -> map_(AZA, AZB).

merge(Map, New_entries) ->

    maps:merge(Map, New_entries).



-spec delete(map_(AZQ, AZR), AZQ) -> map_(AZQ, AZR).

delete(Map, Key) ->

    maps:remove(Key, Map).



-spec drop(map_(BAC, BAD), list(BAC)) -> map_(BAC, BAD).

drop(Map, Disallowed_keys) ->

    gleam@list:fold(Disallowed_keys, Map, fun delete/2).



-spec update(map_(BAJ, BAK), BAJ, fun((gleam@option:option(BAK)) -> BAK)) -> map_(BAJ, BAK).

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 do_fold(list({BAQ, BAR}), BAT, fun((BAT, BAQ, BAR) -> BAT)) -> BAT.

do_fold(List, Initial, Fun) ->

    case List of

        [] ->

            Initial;



        [{K, V} | Tail] ->

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

    end.



-spec fold(map_(BAU, BAV), BAY, fun((BAY, BAU, BAV) -> BAY)) -> BAY.

fold(Map, Initial, Fun) ->

    _pipe = Map,

    _pipe@1 = to_list(_pipe),

    do_fold(_pipe@1, Initial, Fun).