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gleam_stdlib
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retired
A standard library for the Gleam programming language
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Files
src/gleam@pair.erl
-module(gleam@pair).
-compile([no_auto_import, nowarn_unused_vars, nowarn_unused_function, nowarn_nomatch]).
-export([first/1, second/1, swap/1, map_first/2, map_second/2, new/2]).
-if(?OTP_RELEASE >= 27).
-define(MODULEDOC(Str), -moduledoc(Str)).
-define(DOC(Str), -doc(Str)).
-else.
-define(MODULEDOC(Str), -compile([])).
-define(DOC(Str), -compile([])).
-endif.
-file("src/gleam/pair.gleam", 10).
?DOC(
" Returns the first element in a pair.\n"
"\n"
" ## Examples\n"
"\n"
" ```gleam\n"
" first(#(1, 2))\n"
" // -> 1\n"
" ```\n"
).
-spec first({YA, any()}) -> YA.
first(Pair) ->
{A, _} = Pair,
A.
-file("src/gleam/pair.gleam", 24).
?DOC(
" Returns the second element in a pair.\n"
"\n"
" ## Examples\n"
"\n"
" ```gleam\n"
" second(#(1, 2))\n"
" // -> 2\n"
" ```\n"
).
-spec second({any(), YD}) -> YD.
second(Pair) ->
{_, A} = Pair,
A.
-file("src/gleam/pair.gleam", 38).
?DOC(
" Returns a new pair with the elements swapped.\n"
"\n"
" ## Examples\n"
"\n"
" ```gleam\n"
" swap(#(1, 2))\n"
" // -> #(2, 1)\n"
" ```\n"
).
-spec swap({YE, YF}) -> {YF, YE}.
swap(Pair) ->
{A, B} = Pair,
{B, A}.
-file("src/gleam/pair.gleam", 53).
?DOC(
" Returns a new pair with the first element having had `with` applied to\n"
" it.\n"
"\n"
" ## Examples\n"
"\n"
" ```gleam\n"
" #(1, 2) |> map_first(fn(n) { n * 2 })\n"
" // -> #(2, 2)\n"
" ```\n"
).
-spec map_first({YG, YH}, fun((YG) -> YI)) -> {YI, YH}.
map_first(Pair, Fun) ->
{A, B} = Pair,
{Fun(A), B}.
-file("src/gleam/pair.gleam", 68).
?DOC(
" Returns a new pair with the second element having had `with` applied to\n"
" it.\n"
"\n"
" ## Examples\n"
"\n"
" ```gleam\n"
" #(1, 2) |> map_second(fn(n) { n * 2 })\n"
" // -> #(1, 4)\n"
" ```\n"
).
-spec map_second({YJ, YK}, fun((YK) -> YL)) -> {YJ, YL}.
map_second(Pair, Fun) ->
{A, B} = Pair,
{A, Fun(B)}.
-file("src/gleam/pair.gleam", 83).
?DOC(
" Returns a new pair with the given elements. This can also be done using the dedicated\n"
" syntax instead: `new(1, 2) == #(1, 2)`.\n"
"\n"
" ## Examples\n"
"\n"
" ```gleam\n"
" new(1, 2)\n"
" // -> #(1, 2)\n"
" ```\n"
).
-spec new(YM, YN) -> {YM, YN}.
new(First, Second) ->
{First, Second}.