Packages

gleam_stdlib

0.17.0
1.0.3 1.0.2 1.0.1 1.0.0 0.71.0 0.70.0 0.69.0 0.68.1 0.68.0 0.67.1 0.67.0 0.65.0 0.64.0 0.63.2 0.63.1 0.63.0 0.62.1 0.62.0 0.61.0 0.60.0 0.59.0 0.58.0 0.57.0 0.56.0 0.55.0 0.54.0 0.53.0 0.52.0 0.51.0 0.50.0 0.49.0 0.48.0 0.47.0 0.46.0 0.45.0 0.44.0 0.43.0 0.42.0 0.41.0 0.40.0 0.39.0 0.38.0 0.37.0 0.36.0 0.35.1 0.35.0 0.34.0 0.33.1 0.33.0 0.32.1 0.32.0 0.31.0 0.30.2 0.30.1 0.30.0 0.29.2 0.29.1 0.29.0 0.28.2 0.28.1 0.28.0 0.27.0 0.26.1 0.26.0 0.25.0 0.24.0 0.23.0 0.22.3 0.22.2 0.22.1 0.22.0 0.21.0 0.20.0 0.19.3 0.19.2 0.19.1 0.19.0 0.18.1 0.18.0 0.18.0-rc1 0.17.1 0.17.0 0.16.0 0.15.0 0.14.0 0.13.0 0.12.0 0.11.0 0.10.1 0.10.0 0.9.0 0.8.0 0.7.0 0.6.0 0.5.0 0.4.0 0.4.0-rc1 0.3.1 0.3.0 0.2.0 retired

A standard library for the Gleam programming language

HexDocs

Current section

Files

Jump to
Readme
100 Versions
0 Dependencies
1566 Dependants
Files
Activity
gleam_stdlib gen src gleam@set.erl
Raw

gen/src/gleam@set.erl 

-module(gleam@set).

-compile(no_auto_import).



-export([new/0, size/1, insert/2, contains/2, delete/2, to_list/1, from_list/1, fold/3, filter/2, take/2, union/2, intersection/2]).

-export_type([set/1]).



-opaque set(EHT) :: {set, gleam@map:map_(EHT, list(nil))}.



-spec new() -> set(any()).

new() ->

    {set, gleam@map:new()}.



-spec size(set(any())) -> integer().

size(Set) ->

    gleam@map:size(erlang:element(2, Set)).



-spec insert(set(EIC), EIC) -> set(EIC).

insert(Set, Member) ->

    {set, gleam@map:insert(erlang:element(2, Set), Member, [])}.



-spec contains(set(EIF), EIF) -> boolean().

contains(Set, Member) ->

    _pipe = erlang:element(2, Set),

    _pipe@1 = gleam@map:get(_pipe, Member),

    gleam@result:is_ok(_pipe@1).



-spec delete(set(EIH), EIH) -> set(EIH).

delete(Set, Member) ->

    {set, gleam@map:delete(erlang:element(2, Set), Member)}.



-spec to_list(set(EIK)) -> list(EIK).

to_list(Set) ->

    gleam@map:keys(erlang:element(2, Set)).



-spec from_list(list(EIN)) -> set(EIN).

from_list(Members) ->

    Map = gleam@list:fold(

        Members,

        gleam@map:new(),

        fun(M, K) -> gleam@map:insert(M, K, []) end

    ),

    {set, Map}.



-spec fold(set(EIQ), EIS, fun((EIS, EIQ) -> EIS)) -> EIS.

fold(Set, Initial, Reducer) ->

    gleam@map:fold(

        erlang:element(2, Set),

        Initial,

        fun(A, K, _) -> Reducer(A, K) end

    ).



-spec filter(set(EIT), fun((EIT) -> boolean())) -> set(EIT).

filter(Set, Property) ->

    {set,

     gleam@map:filter(erlang:element(2, Set), fun(M, _) -> Property(M) end)}.



-spec take(set(EIW), list(EIW)) -> set(EIW).

take(Set, Desired) ->

    {set, gleam@map:take(erlang:element(2, Set), Desired)}.



-spec order(set(EJA), set(EJA)) -> {set(EJA), set(EJA)}.

order(First, Second) ->

    case gleam@map:size(erlang:element(2, First))

    > gleam@map:size(erlang:element(2, Second)) of

        true ->

            {First, Second};



        false ->

            {Second, First}

    end.



-spec union(set(EJF), set(EJF)) -> set(EJF).

union(First, Second) ->

    {Larger, Smaller} = order(First, Second),

    fold(Smaller, Larger, fun insert/2).



-spec intersection(set(EJJ), set(EJJ)) -> set(EJJ).

intersection(First, Second) ->

    {Larger, Smaller} = order(First, Second),

    take(Larger, to_list(Smaller)).