[gleam] complete wine-cellar

gleam/wine-cellar/.gitignore

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

gleam/wine-cellar/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/wine_cellar.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/wine-cellar/HINTS.md

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+# Hints
+
+## 1. Get all wines of a given color
+
+- Keyword arguments are specified by writing a name before the argument name, separated by a space.
+- The [`list.filter`][list-filter] function can be used to select elements from a list that match a given predicate.
+
+## 2. Get all wines of a given color bottled in a given year
+
+- Keyword arguments are specified by writing a name before the argument name, separated by a space.
+- The [`list.filter`][list-filter] function can be used to select elements from a list that match a given predicate.
+
+## 3. Get all wines of a given color bottled in a given country
+
+- This function can be implemented by calling `wines_from_country` and then `wines_of_color` on the output.
+
+[list-filter]: https://hexdocs.pm/gleam_stdlib/gleam/list.html#filter

gleam/wine-cellar/README.md

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+# Wine Cellar
+
+Welcome to Wine Cellar 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
+
+## Labelled Arguments
+
+Sometimes when a function takes many arguments it can be difficult to remember the order they should be given in. To aid readability Gleam allows arguments to be labelled with a name.
+
+To label an argument specify the label name before the argument name, separated by a space.
+
+```gleam
+pub fn replace(
+  in string: String,
+  each target: String,
+  with replacement: String
+) -> String {
+  // ...
+}
+```
+
+When calling a function with labelled arguments the arguments can be given in any order. Each of these calls to `replace` are equivalent:
+
+```gleam
+replace(in: "🍔🍔🍔" each: "🍔", with: "🍕")
+
+replace(each: "🍔", in: "🍔🍔🍔", with: "🍕")
+
+replace(with: "🍕", each: "🍔", in: "🍔🍔🍔")
+```
+
+Labels are always optional. Even if a function has labelled arguments they can still be called without labels.
+
+```gleam
+replace("🍔🍔🍔", "🍔", "🍕")
+```
+
+## Instructions
+
+You are the manager of a fancy restaurant that has a sizable wine cellar. A lot of your customers are demanding wine enthusiasts. Finding the right bottle of wine for a particular customer is not an easy task.
+
+As a tech-savvy restaurant owner, you decided to speed up the wine selection process by writing an app that will let guests filter your wines by their preferences.
+
+## 1. Get all wines of a given color
+
+A bottle of wine is represented using a custom type, and wines are stored in a list.
+
+```gleam
+[
+  Wine("Chardonnay", 2015, "Italy", White),
+  Wine("Pinot grigio", 2017, "Germany", White),
+  Wine("Pinot noir", 2016, "France", Red),
+  Wine("Dornfelder", 2018, "Germany", Rose)
+]
+```
+
+Implement the `wines_of_color` function. It should take a list of wines and return all wines of a given color.
+
+```gleam
+wines_of_color(
+  [
+    Wine("Chardonnay", 2015, "Italy", White),
+    Wine("Pinot grigio", 2017, "Germany", White),
+    Wine("Pinot noir", 2016, "France", Red),
+    Wine("Dornfelder", 2018, "Germany", Rose)
+  ],
+  color: White
+)
+// -> [
+//   Wine("Chardonnay", 2015, "Italy", White),
+//   Wine("Pinot grigio", 2017, "Germany", White),
+// ]
+```
+
+## 2. Get all wines bottles in a given country
+
+Implement the `wines_from_country` function. It should take a list of wines and return all wines from a given country.
+
+```gleam
+wines_from_country(
+  [
+    Wine("Chardonnay", 2015, "Italy", White),
+    Wine("Pinot grigio", 2017, "Germany", White),
+    Wine("Pinot noir", 2016, "France", Red),
+    Wine("Dornfelder", 2018, "Germany", Rose)
+  ],
+  country: "Germany"
+)
+// -> [
+//   Wine("Dornfelder", 2018, "Germany", Rose)
+// ]
+```
+
+## 3. Get all wines of a given color bottled in a given country
+
+Implement the `filter` function. It should take a list of wines, a color and a country and return all wines of the given color bottled in the given country.
+
+```gleam
+filter(
+  [
+    Wine("Chardonnay", 2015, "Italy", White),
+    Wine("Pinot grigio", 2017, "Germany", White),
+    Wine("Pinot noir", 2016, "France", Red),
+    Wine("Dornfelder", 2018, "Germany", Rose)
+  ],
+  color: White
+  country: "Italy"
+)
+// -> [
+//   Wine("Chardonnay", 2015, "Italy", White),
+// ]
+```
+
+## Source
+
+### Created by
+
+- @lpil

gleam/wine-cellar/gleam.toml

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+name = "wine_cellar"
+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"
+gleam_erlang = ">= 0.25.0 and < 1.0.0"
+
+[dev-dependencies]
+exercism_test_runner = "~> 1.4"

gleam/wine-cellar/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 = "0.25.0", build_tools = ["gleam"], requirements = ["gleam_stdlib"], otp_app = "gleam_erlang", source = "hex", outer_checksum = "054D571A7092D2A9727B3E5D183B7507DAB0DA41556EC9133606F09C15497373" },
+  { 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_erlang = { version = ">= 0.25.0 and < 1.0.0"}
+gleam_otp = { version = "~> 0.7 or ~> 1.0" }
+gleam_stdlib = { version = "~> 0.32 or ~> 1.0" }
+simplifile = { version = "~> 1.0" }

gleam/wine-cellar/src/wine_cellar.gleam

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+import gleam/list
+
+pub fn wines_of_color(wines: List(Wine), color: Color) -> List(Wine) {
+  list.filter(wines, keeping: fn(wine) { wine.color == color })
+}
+
+pub fn wines_from_country(wines: List(Wine), country: String) -> List(Wine) {
+  list.filter(wines, keeping: fn(wine) { wine.country == country })
+}
+
+pub fn filter(
+  wines: List(Wine),
+  color color: Color,
+  country country: String,
+) -> List(Wine) {
+  wines
+  |> wines_of_color(color)
+  |> wines_from_country(country)
+}
+
+pub type Wine {
+  Wine(name: String, year: Int, country: String, color: Color)
+}
+
+pub type Color {
+  Red
+  Rose
+  White
+}

gleam/wine-cellar/test/wine_cellar_test.gleam

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+import exercism/should
+import exercism/test_runner
+import wine_cellar.{Red, Rose, White, Wine}
+
+const cellar = [
+  Wine("Chardonnay", 2015, "Italy", White),
+  Wine("Chardonnay", 2014, "France", White),
+  Wine("Dornfelder", 2018, "Germany", Rose),
+  Wine("Merlot", 2015, "France", Red),
+  Wine("Riesling", 2017, "Germany", White),
+  Wine("Pinot grigio", 2015, "Germany", White),
+  Wine("Pinot noir", 2016, "France", Red),
+  Wine("Pinot noir", 2013, "Italy", Red),
+]
+
+pub fn main() {
+  test_runner.main()
+}
+
+pub fn wines_of_color_white_test() {
+  cellar
+  |> wine_cellar.wines_of_color(White)
+  |> should.equal([
+    Wine("Chardonnay", 2015, "Italy", White),
+    Wine("Chardonnay", 2014, "France", White),
+    Wine("Riesling", 2017, "Germany", White),
+    Wine("Pinot grigio", 2015, "Germany", White),
+  ])
+}
+
+pub fn wines_of_color_red_test() {
+  cellar
+  |> wine_cellar.wines_of_color(Red)
+  |> should.equal([
+    Wine("Merlot", 2015, "France", Red),
+    Wine("Pinot noir", 2016, "France", Red),
+    Wine("Pinot noir", 2013, "Italy", Red),
+  ])
+}
+
+pub fn wines_of_color_rose_test() {
+  cellar
+  |> wine_cellar.wines_of_color(Rose)
+  |> should.equal([Wine("Dornfelder", 2018, "Germany", Rose)])
+}
+
+pub fn wines_from_country_france_test() {
+  cellar
+  |> wine_cellar.wines_from_country("France")
+  |> should.equal([
+    Wine("Chardonnay", 2014, "France", White),
+    Wine("Merlot", 2015, "France", Red),
+    Wine("Pinot noir", 2016, "France", Red),
+  ])
+}
+
+pub fn wines_from_country_germany_test() {
+  cellar
+  |> wine_cellar.wines_from_country("Germany")
+  |> should.equal([
+    Wine("Dornfelder", 2018, "Germany", Rose),
+    Wine("Riesling", 2017, "Germany", White),
+    Wine("Pinot grigio", 2015, "Germany", White),
+  ])
+}
+
+pub fn wines_from_country_scotland_test() {
+  cellar
+  |> wine_cellar.wines_from_country("Scotland")
+  |> should.equal([])
+}
+
+pub fn filter_white_germany_test() {
+  cellar
+  |> wine_cellar.filter(color: White, country: "Germany")
+  |> should.equal([
+    Wine("Riesling", 2017, "Germany", White),
+    Wine("Pinot grigio", 2015, "Germany", White),
+  ])
+}
+
+pub fn filter_red_france_test() {
+  cellar
+  |> wine_cellar.filter(country: "France", color: Red)
+  |> should.equal([
+    Wine("Merlot", 2015, "France", Red),
+    Wine("Pinot noir", 2016, "France", Red),
+  ])
+}