[gleam] complete treasure-chest

gleam/treasure-chest/.gitignore

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+*.beam
+*.ez
+build
+erl_crash.dump

gleam/treasure-chest/HELP.md

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+# Help
+
+## Running the tests
+
+To run the tests, run the command `gleam test` from within the exercise directory.
+
+## Submitting your solution
+
+You can submit your solution using the `exercism submit src/treasure_chest.gleam` command.
+This command will upload your solution to the Exercism website and print the solution page's URL.
+
+It's possible to submit an incomplete solution which allows you to:
+
+- See how others have completed the exercise
+- Request help from a mentor
+
+## Need to get help?
+
+If you'd like help solving the exercise, check the following pages:
+
+- The [Gleam track's documentation](https://exercism.org/docs/tracks/gleam)
+- The [Gleam track's programming category on the forum](https://forum.exercism.org/c/programming/gleam)
+- [Exercism's programming category on the forum](https://forum.exercism.org/c/programming/5)
+- The [Frequently Asked Questions](https://exercism.org/docs/using/faqs)
+
+Should those resources not suffice, you could submit your (incomplete) solution to request mentoring.
+
+To get help if you're having trouble, you can use one of the following resources:
+
+- [gleam.run](https://gleam.run/documentation/) is the gleam official documentation.
+- [Discord](https://discord.gg/Fm8Pwmy) is the discord channel.
+- [StackOverflow](https://stackoverflow.com/questions/tagged/gleam) can be used to search for your problem and see if it has been answered already. You can also ask and answer questions.

gleam/treasure-chest/HINTS.md

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+# Hints
+
+## 1. Define the TreasureChest generic custom type
+
+- The `TreasureChest` custom type only has a single variant.
+
+## 2. Define the UnlockResult generic custom type
+
+- The `UnlockResult` custom type has 2 variants, `Unlocked`, and `WrongPassword`.
+
+## 3. Define the get_treasure function
+
+- Custom types can be pattern matched on in the same way to access their values.

gleam/treasure-chest/README.md

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+# Treasure Chest
+
+Welcome to Treasure Chest on Exercism's Gleam Track.
+If you need help running the tests or submitting your code, check out `HELP.md`.
+If you get stuck on the exercise, check out `HINTS.md`, but try and solve it without using those first :)
+
+## Introduction
+
+## Generics
+
+A type is a _generic type_ when it can contain values of any type using a _type parameter_.
+
+For example, this `Box` type has the type parameter `a` (written with lowercase letters).
+
+```gleam
+pub type Box(a) {
+  Box(a)
+}
+```
+
+The `a` type parameter is a placeholder for any type, so `Box` can be used with strings, ints, or any other type.
+
+```gleam
+Box("Hello, Joe!") // The type is Box(String)
+
+Box(42) // The type is Box(Int)
+```
+
+A type can have multiple type parameters by separating them with commas.
+
+```gleam
+pub type Pair(a, b) {
+  Pair(a, b)
+}
+```
+
+### Generic functions
+
+Type parameters can also be used in the arguments of functions.
+
+This function takes a value of the type `a` and calls twice a function that takes an `a` and returns a `b`.
+
+```gleam
+pub fn twice(value: a, f: fn(a) -> b) -> b {
+  f(value)
+  f(value)
+}
+```
+```gleam
+// The type is fn(String, fn(String) -> Nil) -> Nil
+twice("Hello, Joe!", io.println)
+```
+
+## Instructions
+
+In this exercise you're going to write a generic (/ magical!) TreasureChest, to store some treasure.
+
+## 1. Define the TreasureChest generic custom type
+
+Define a `TreasureChest` custom type with a single variant.
+
+The variant should have an associated `String` value, which will be used to store the password of the treasure chest.
+
+The variant should also have an associate generic value, which will be used to store the treasure.
+This value is generic so that the treasure can be anything.
+
+## 2. Define the UnlockResult type
+
+Define a `UnlockResult` custom type with two variants.
+
+The first variant should be `Unlocked`, and should hold generic value, which will be used to store the treasure.
+
+The second variant should be `WrongPassword`, which holds no values.
+
+## 3. Define the get_treasure function
+
+This function should take two parameters
+
+- a `TreasureChest` generic custom type
+- a `String` (for trying a password)
+
+This function should check the provided password attempt against the `String` in the `TreasureChest`.
+
+The function should return a `UnlockResult`.
+
+If the passwords match then return `Unlocked` with the generic value from the `TreasureChest` (the treasure!)
+
+If the passwords do not match then return `WrongPassword`.
+
+## Source
+
+### Created by
+
+- @lpil

gleam/treasure-chest/gleam.toml

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+name = "treasure_chest"
+version = "0.1.0"
+
+[dependencies]
+gleam_bitwise = "~> 1.2"
+gleam_otp = "~> 0.7 or ~> 1.0"
+gleam_stdlib = "~> 0.32 or ~> 1.0"
+simplifile = "~> 1.0"
+
+[dev-dependencies]
+exercism_test_runner = "~> 1.4"

gleam/treasure-chest/manifest.toml

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+# This file was generated by Gleam
+# You typically do not need to edit this file
+
+packages = [
+  { name = "argv", version = "1.0.1", build_tools = ["gleam"], requirements = [], otp_app = "argv", source = "hex", outer_checksum = "A6E9009E50BBE863EB37D963E4315398D41A3D87D0075480FC244125808F964A" },
+  { name = "exercism_test_runner", version = "1.7.0", build_tools = ["gleam"], requirements = ["argv", "gap", "glance", "gleam_community_ansi", "gleam_erlang", "gleam_json", "gleam_stdlib", "simplifile"], otp_app = "exercism_test_runner", source = "hex", outer_checksum = "2FC1BADB19BEC2AE77BFD2D3A606A014C85412A7B874CAFC4BA8CF04B0B257CD" },
+  { name = "gap", version = "1.1.0", build_tools = ["gleam"], requirements = ["gleam_community_ansi", "gleam_stdlib"], otp_app = "gap", source = "hex", outer_checksum = "2EE1B0A17E85CF73A0C1D29DA315A2699117A8F549C8E8D89FA8261BE41EDEB1" },
+  { name = "glance", version = "0.8.2", build_tools = ["gleam"], requirements = ["gleam_stdlib", "glexer"], otp_app = "glance", source = "hex", outer_checksum = "ACF09457E8B564AD7A0D823DAFDD326F58263C01ACB0D432A9BEFDEDD1DA8E73" },
+  { name = "gleam_bitwise", version = "1.3.1", build_tools = ["gleam"], requirements = [], otp_app = "gleam_bitwise", source = "hex", outer_checksum = "B36E1D3188D7F594C7FD4F43D0D2CE17561DE896202017548578B16FE1FE9EFC" },
+  { name = "gleam_community_ansi", version = "1.4.0", build_tools = ["gleam"], requirements = ["gleam_community_colour", "gleam_stdlib"], otp_app = "gleam_community_ansi", source = "hex", outer_checksum = "FE79E08BF97009729259B6357EC058315B6FBB916FAD1C2FF9355115FEB0D3A4" },
+  { name = "gleam_community_colour", version = "1.3.0", build_tools = ["gleam"], requirements = ["gleam_stdlib"], otp_app = "gleam_community_colour", source = "hex", outer_checksum = "A49A5E3AE8B637A5ACBA80ECB9B1AFE89FD3D5351FF6410A42B84F666D40D7D5" },
+  { name = "gleam_erlang", version = "0.24.0", build_tools = ["gleam"], requirements = ["gleam_stdlib"], otp_app = "gleam_erlang", source = "hex", outer_checksum = "26BDB52E61889F56A291CB34167315780EE4AA20961917314446542C90D1C1A0" },
+  { name = "gleam_json", version = "1.0.0", build_tools = ["gleam"], requirements = ["gleam_stdlib", "thoas"], otp_app = "gleam_json", source = "hex", outer_checksum = "8B197DD5D578EA6AC2C0D4BDC634C71A5BCA8E7DB5F47091C263ECB411A60DF3" },
+  { name = "gleam_otp", version = "0.10.0", build_tools = ["gleam"], requirements = ["gleam_erlang", "gleam_stdlib"], otp_app = "gleam_otp", source = "hex", outer_checksum = "0B04FE915ACECE539B317F9652CAADBBC0F000184D586AAAF2D94C100945D72B" },
+  { name = "gleam_stdlib", version = "0.36.0", build_tools = ["gleam"], requirements = [], otp_app = "gleam_stdlib", source = "hex", outer_checksum = "C0D14D807FEC6F8A08A7C9EF8DFDE6AE5C10E40E21325B2B29365965D82EB3D4" },
+  { name = "glexer", version = "0.7.0", build_tools = ["gleam"], requirements = ["gleam_stdlib"], otp_app = "glexer", source = "hex", outer_checksum = "4484942A465482A0A100936E1E5F12314DB4B5AC0D87575A7B9E9062090B96BE" },
+  { name = "simplifile", version = "1.5.0", build_tools = ["gleam"], requirements = ["gleam_stdlib"], otp_app = "simplifile", source = "hex", outer_checksum = "EB9AA8E65E5C1E3E0FDCFC81BC363FD433CB122D7D062750FFDF24DE4AC40116" },
+  { name = "thoas", version = "0.4.1", build_tools = ["rebar3"], requirements = [], otp_app = "thoas", source = "hex", outer_checksum = "4918D50026C073C4AB1388437132C77A6F6F7C8AC43C60C13758CC0ADCE2134E" },
+]
+
+[requirements]
+exercism_test_runner = { version = "~> 1.4" }
+gleam_bitwise = { version = "~> 1.2" }
+gleam_otp = { version = "~> 0.7 or ~> 1.0" }
+gleam_stdlib = { version = "~> 0.32 or ~> 1.0" }
+simplifile = { version = "~> 1.0" }

gleam/treasure-chest/src/treasure_chest.gleam

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+pub type TreasureChest(treasure) {
+  TreasureChest(password: String, treasure: treasure)
+}
+
+pub type UnlockResult(treasure) {
+  Unlocked(treasure: treasure)
+  WrongPassword
+}
+
+pub fn get_treasure(
+  chest: TreasureChest(treasure),
+  password: String,
+) -> UnlockResult(treasure) {
+  case chest.password == password {
+    True -> Unlocked(treasure: chest.treasure)
+    False -> WrongPassword
+  }
+}

gleam/treasure-chest/test/treasure_chest_test.gleam

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+import exercism/should
+import exercism/test_runner
+import treasure_chest.{TreasureChest, Unlocked, WrongPassword}
+
+pub fn main() {
+  test_runner.main()
+}
+
+pub fn treasure_can_be_a_string_test() {
+  TreasureChest("password", "treasure")
+}
+
+pub fn treasure_can_be_an_int_test() {
+  TreasureChest("password", 5)
+}
+
+pub fn treasure_is_returned_if_correct_password_test() {
+  TreasureChest("password", "treasure")
+  |> treasure_chest.get_treasure("password")
+  |> should.equal(Unlocked("treasure"))
+}
+
+pub fn wrong_password_is_returned_if_an_incorrect_password_is_used_test() {
+  TreasureChest("password", "treasure")
+  |> treasure_chest.get_treasure("wrong-password")
+  |> should.equal(WrongPassword)
+}