:sparkles: (Gleam) aoc day 3

gleam.toml

···
 gleam_stdlib = ">= 0.34.0 and < 2.0.0"
 gleam_erlang = ">= 0.32.0 and < 1.0.0"
 simplifile = ">= 2.2.0 and < 3.0.0"
+gleam_regexp = ">= 1.1.0 and < 2.0.0"
 
 [dev-dependencies]
 gleeunit = ">= 1.0.0 and < 2.0.0"

input/day_03

···
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+%how()how():?:mul(766,746)*@mul(364,566)-< who()(*':mul(999,344)*/select()--mul(672,593){how())<mul(73#)()@+mul(83,507)  mul(373,176)who()^'('mul(584,620)what()#//!do()mul(103,225) ~;;'why()*~mul(187,119)+/]mul+(select()%mul(874,888)}when():how()mul(583,992)^~[[what()don't()() {from() ]]((mul(68,200)^?what()who()*[mul(932,283)['$mul(189,932)< ,mul(652,125))$how()where()how()^how()#]mul(501,335)!when():+%])!<mul(551,924)+,#why()) $mul(118,951)@])/'who()mul(858,212) who(){-how()!don't())mul(746,402)/%}where()mul(629,312)];*~#]mul(680,3)what()how()what()'}?'@where();mul(263,427)#$$from()-what()mul(698,847)#(;$!$<+mul;why())what())$select()mul(482,169)-where()mul(546,79)mul(796,632)how()select()when()&$/*mul(749,226)-%what()>(who()'/<when()mul(932,346)?where(),^^>mul(722,627)>-?mul(231,501)~}#!mul(694,751)when()how()- where(202,572)select() }*^mul(17,75):+'what(),&mul(413,505)mul(113,65)[-+{,[mul(83,722)((mul(475,980)mul(588,832):/;)what()/+mul(103,764)?{$:?{{+:select()mul(583,487)mul(757,133)why()??mul(47,54)<]>select()>^?$mul(201,196)$from()]^~#where()mul(494,817)]?//-#select()%+mul(444,319)%?from()mul(316,303)}-~'<<-when()when()mul(350,810)mul(557,674)~##(select()$mul(97,781)who()(>>' >!),mul(473,488)who(290,952)mul(33,630)why()>do():)<select()~ mul(571,144){mul(931,78)mul(200,845)how()#select(403,528)mul(741,613)mul(54,465)@;(<[>mul(267,367)+/who())^select()^from()$!mul(409,900)*what()[)]who())[+where()mul(309,751)~don't()!mul(165,206)mul(113,418)]from(),'&do()select()/*:)]!mul(272,138) mul(211,851)]/$mul(916,846)mul(203,199)mul(40,428){&*from()%mul(305,353)? >}where()<what()(mul(904,794)+$from()-,/{mul(712,685)@ what(628,776)why(){;:;-mul(909,11){<,,mul(287,272),?),>%mul(397,337)]!mul(352,23)@don't()where()^{from()mul(804,392)${<}!mul(392,298),>>mul(572,89)+why()$*;when())#where()$mul(458,495);mul(375,386)~from()mul(429,704),{*%select()$who()]mul(442,21)#why()@?!mul(659,81)when()<($%^&&don't()!mul(934,729)/<[:how(288,214)'mul(971,226);+!%!mul(465,736)/]&%&^what(),+mul(613,544)-/from()what() },<-!mul(906,152)[who()&when()select()mul(612,56)~&<')/!mul(247,423)from()[{&who()mul(979,442)[mul(319,494)~%/+mul(781,251);<>)who()%from()[from()mul(27,381)}+)what()%/select(),,mul(324,64)mul(938,422)how():@>}:%'/&mul(388,707)]@mul(98,712)~who()$%@?(what()from()who()mul(161,906)~where():#mul(198,30)why() ~!>how()['-who()mul(5,68)what()<%%{mul(829,126):,mul(509,883)mul(142,939)do()#>mul(53,112)!(what()/?do()(,how()%mul(523,469) who(){what()'/mul(356,713)~@;!~ ->mul(309,932)where()mul(93,190)where()select()){how()}why()mul(202,888))!,{{:what(),~mul(591,813)select()<&{[&mul(652,199)

manifest.toml

···
 packages = [
   { name = "filepath", version = "1.1.0", build_tools = ["gleam"], requirements = ["gleam_stdlib"], otp_app = "filepath", source = "hex", outer_checksum = "67A6D15FB39EEB69DD31F8C145BB5A421790581BD6AA14B33D64D5A55DBD6587" },
   { name = "gleam_erlang", version = "0.34.0", build_tools = ["gleam"], requirements = ["gleam_stdlib"], otp_app = "gleam_erlang", source = "hex", outer_checksum = "0C38F2A128BAA0CEF17C3000BD2097EB80634E239CE31A86400C4416A5D0FDCC" },
+  { name = "gleam_regexp", version = "1.1.0", build_tools = ["gleam"], requirements = ["gleam_stdlib"], otp_app = "gleam_regexp", source = "hex", outer_checksum = "7F5E0C0BBEB3C58E57C9CB05FA9002F970C85AD4A63BA1E55CBCB35C15809179" },
   { name = "gleam_stdlib", version = "0.55.0", build_tools = ["gleam"], requirements = [], otp_app = "gleam_stdlib", source = "hex", outer_checksum = "32D8F4AE03771516950047813A9E359249BD9FBA5C33463FDB7B953D6F8E896B" },
   { name = "gleeunit", version = "1.3.0", build_tools = ["gleam"], requirements = ["gleam_stdlib"], otp_app = "gleeunit", source = "hex", outer_checksum = "0E6C83834BA65EDCAAF4FE4FB94AC697D9262D83E6F58A750D63C9F6C8A9D9FF" },
   { name = "simplifile", version = "2.2.0", build_tools = ["gleam"], requirements = ["filepath", "gleam_stdlib"], otp_app = "simplifile", source = "hex", outer_checksum = "0DFABEF7DC7A9E2FF4BB27B108034E60C81BEBFCB7AB816B9E7E18ED4503ACD8" },
···
 
 [requirements]
 gleam_erlang = { version = ">= 0.32.0 and < 1.0.0" }
+gleam_regexp = { version = ">= 1.1.0 and < 2.0.0" }
 gleam_stdlib = { version = ">= 0.34.0 and < 2.0.0" }
 gleeunit = { version = ">= 1.0.0 and < 2.0.0" }
 simplifile = { version = ">= 2.2.0 and < 3.0.0" }

src/day_03.gleam

···
+import gleam/int
+import gleam/list
+import gleam/option
+import gleam/regexp
+
+fn transform_regex_values_to_int(
+  submatches: List(option.Option(String)),
+) -> List(Int) {
+  submatches
+  |> option.values
+  |> list.map(fn(x) {
+    let assert Ok(i) = int.parse(x)
+    i
+  })
+}
+
+fn extract_matches_regex(
+  reg: List(regexp.Match),
+  acc: List(List(Int)),
+) -> List(List(Int)) {
+  case reg {
+    [regexp.Match(submatches: subs, ..), ..rest] -> {
+      let values = transform_regex_values_to_int(subs)
+
+      extract_matches_regex(rest, [values, ..acc])
+    }
+    _ -> acc
+  }
+}
+
+pub fn extract_numbers(input: String) -> List(List(Int)) {
+  let assert Ok(re) = regexp.from_string("mul\\((\\d+),(\\d+)\\)")
+
+  regexp.scan(with: re, content: input)
+  |> extract_matches_regex([])
+}
+
+fn multiply_values(input: List(List(Int)), acc: List(Int)) -> List(Int) {
+  case input {
+    [[first, second], ..rest] -> multiply_values(rest, [first * second, ..acc])
+    _ -> acc
+  }
+}
+
+pub fn calculate_result(inputs: List(List(Int))) -> Int {
+  inputs
+  |> multiply_values([])
+  |> int.sum
+}
+
+fn extract_matches_regex_optionally(
+  reg: List(regexp.Match),
+  should_add: Bool,
+  acc: List(List(Int)),
+) -> List(List(Int)) {
+  case should_add, reg {
+    True, [regexp.Match(submatches: [option.None, ..subs], ..), ..rest] -> {
+      let values = transform_regex_values_to_int(subs)
+
+      extract_matches_regex_optionally(rest, should_add, [values, ..acc])
+    }
+    False, [regexp.Match(submatches: [option.None, ..], ..), ..rest] ->
+      extract_matches_regex_optionally(rest, should_add, acc)
+    _, [regexp.Match(submatches: [option.Some("do()")], ..), ..rest] ->
+      extract_matches_regex_optionally(rest, True, acc)
+    _, [regexp.Match(submatches: [option.Some("don't()")], ..), ..rest] ->
+      extract_matches_regex_optionally(rest, False, acc)
+    _, _ -> acc
+  }
+}
+
+pub fn extract_numbers_with_do_and_dont(input: String) -> List(List(Int)) {
+  let assert Ok(re) =
+    regexp.from_string("(don't\\(\\)|do\\(\\))|mul\\((\\d+),(\\d+)\\)")
+
+  regexp.scan(with: re, content: input)
+  |> extract_matches_regex_optionally(True, [])
+}

test/day_03_test.gleam

···
+import day_03
+import gleeunit
+import gleeunit/should
+import simplifile
+
+pub fn main() {
+  gleeunit.main()
+}
+
+pub fn regex_extraction_test() {
+  "xmul(2,4)%&mul[3,7]!@^do_not_mul(5,5)+mul(32,64]then(mul(11,8)mul(8,5))"
+  |> day_03.extract_numbers
+  |> should.equal([[8, 5], [11, 8], [5, 5], [2, 4]])
+}
+
+pub fn calculate_result_test() {
+  "xmul(2,4)%&mul[3,7]!@^do_not_mul(5,5)+mul(32,64]then(mul(11,8)mul(8,5))"
+  |> day_03.extract_numbers
+  |> day_03.calculate_result
+  |> should.equal(161)
+}
+
+pub fn calculate_result_for_real_test() {
+  let assert Ok(file) = simplifile.read("input/day_03")
+
+  file
+  |> day_03.extract_numbers
+  |> day_03.calculate_result
+  |> should.equal(167_650_499)
+}
+
+pub fn regex_extraction_with_do_and_dont_test() {
+  "xmul(2,4)&mul[3,7]!^don't()_mul(5,5)+mul(32,64](mul(11,8)undo()?mul(8,5))"
+  |> day_03.extract_numbers_with_do_and_dont
+  |> should.equal([[8, 5], [2, 4]])
+}
+
+pub fn calculate_result_with_do_and_dont_test() {
+  "xmul(2,4)&mul[3,7]!^don't()_mul(5,5)+mul(32,64](mul(11,8)undo()?mul(8,5))"
+  |> day_03.extract_numbers_with_do_and_dont
+  |> day_03.calculate_result
+  |> should.equal(48)
+}
+
+pub fn calculate_result_with_do_and_dont_for_real_test() {
+  let assert Ok(file) = simplifile.read("input/day_03")
+
+  file
+  |> day_03.extract_numbers_with_do_and_dont
+  |> day_03.calculate_result
+  |> should.equal(95_846_796)
+}