Add practice exercise line-up

config.json

@@ -875,6 +875,21 @@
         ],
         "difficulty": 2
       },
+      {
+        "slug": "line-up",
+        "name": "Line Up",
+        "uuid": "f633a810-0323-496b-a728-e05f560fe393",
+        "practices": [
+          "cond"
+        ],
+        "prerequisites": [
+          "integers",
+          "strings",
+          "cond",
+          "lists"
+        ],
+        "difficulty": 2
+      },
       {
         "slug": "nth-prime",
         "name": "Nth Prime",

exercises/practice/line-up/.docs/instructions.md

@@ -0,0 +1,19 @@
+# Instructions
+
+Given a name and a number, your task is to produce a sentence using that name and that number as an [ordinal numeral][ordinal-numeral].
+Yaʻqūb expects to use numbers from 1 up to 999.
+
+Rules:
+
+- Numbers ending in 1 (unless ending in 11) → `"st"`
+- Numbers ending in 2 (unless ending in 12) → `"nd"`
+- Numbers ending in 3 (unless ending in 13) → `"rd"`
+- All other numbers → `"th"`
+
+Examples:
+
+- `"Mary", 1` → `"Mary, you are the 1st customer we serve today. Thank you!"`
+- `"John", 12` → `"John, you are the 12th customer we serve today. Thank you!"`
+- `"Dahir", 162` → `"Dahir, you are the 162nd customer we serve today. Thank you!"`
+
+[ordinal-numeral]: https://en.wikipedia.org/wiki/Ordinal_numeral

exercises/practice/line-up/.docs/introduction.md

@@ -0,0 +1,7 @@
+# Introduction
+
+Your friend Yaʻqūb works the counter at a deli in town, slicing, weighing, and wrapping orders for a line of hungry customers that gets longer every day.
+Waiting customers are starting to lose track of who is next, so he wants numbered tickets they can use to track the order in which they arrive.
+
+To make the customers feel special, he does not want the ticket to have only a number on it.
+They shall get a proper English sentence with their name and number on it.

exercises/practice/line-up/.formatter.exs

@@ -0,0 +1,4 @@
+# Used by "mix format"
+[
+  inputs: ["{mix,.formatter}.exs", "{config,lib,test}/**/*.{ex,exs}"]
+]

exercises/practice/line-up/.gitignore

@@ -0,0 +1,26 @@
+# The directory Mix will write compiled artifacts to.
+/_build/
+
+# If you run "mix test --cover", coverage assets end up here.
+/cover/
+
+# The directory Mix downloads your dependencies sources to.
+/deps/
+
+# Where third-party dependencies like ExDoc output generated docs.
+/doc/
+
+# Ignore .fetch files in case you like to edit your project deps locally.
+/.fetch
+
+# If the VM crashes, it generates a dump, let's ignore it too.
+erl_crash.dump
+
+# Also ignore archive artifacts (built via "mix archive.build").
+*.ez
+
+# Ignore package tarball (built via "mix hex.build").
+line_up-*.tar
+
+# Temporary files, for example, from tests.
+/tmp/

exercises/practice/line-up/.meta/config.json

@@ -0,0 +1,19 @@
+{
+  "authors": [
+    "FraSanga"
+  ],
+  "files": {
+    "solution": [
+      "lib/line_up.ex"
+    ],
+    "test": [
+      "test/line_up_test.exs"
+    ],
+    "example": [
+      ".meta/example.ex"
+    ]
+  },
+  "blurb": "Help lining up customers at Yaʻqūb's Deli.",
+  "source": "mk-mxp, based on previous work from Exercism contributors codedge and neenjaw",
+  "source_url": "https://forum.exercism.org/t/new-exercise-ordinal-numbers/19147"
+}

exercises/practice/line-up/.meta/example.ex

@@ -0,0 +1,19 @@
+defmodule LineUp do
+  @doc """
+  Formats a full sentence for a given name and position in the line-up,
+  using the correctly suffixed ordinal numeral.
+  """
+  @spec format(name :: String.t(), number :: pos_integer()) :: String.t()
+  def format(name, number) do
+    suffix =
+      cond do
+        rem(number, 100) in [11, 12, 13] -> "th"
+        rem(number, 10) == 1 -> "st"
+        rem(number, 10) == 2 -> "nd"
+        rem(number, 10) == 3 -> "rd"
+        true -> "th"
+      end
+
+    "#{name}, you are the #{number}#{suffix} customer we serve today. Thank you!"
+  end
+end

exercises/practice/line-up/.meta/tests.toml

@@ -0,0 +1,67 @@
+# This is an auto-generated file.
+#
+# Regenerating this file via `configlet sync` will:
+# - Recreate every `description` key/value pair
+# - Recreate every `reimplements` key/value pair, where they exist in problem-specifications
+# - Remove any `include = true` key/value pair (an omitted `include` key implies inclusion)
+# - Preserve any other key/value pair
+#
+# As user-added comments (using the # character) will be removed when this file
+# is regenerated, comments can be added via a `comment` key.
+
+[7760d1b8-4864-4db4-953b-0fa7c047dbc0]
+description = "format smallest non-exceptional ordinal numeral 4"
+
+[e8b7c715-6baa-4f7b-8fb3-2fa48044ab7a]
+description = "format greatest single digit non-exceptional ordinal numeral 9"
+
+[f370aae9-7ae7-4247-90ce-e8ff8c6934df]
+description = "format non-exceptional ordinal numeral 5"
+
+[37f10dea-42a2-49de-bb92-0b690b677908]
+description = "format non-exceptional ordinal numeral 6"
+
+[d8dfb9a2-3a1f-4fee-9dae-01af3600054e]
+description = "format non-exceptional ordinal numeral 7"
+
+[505ec372-1803-42b1-9377-6934890fd055]
+description = "format non-exceptional ordinal numeral 8"
+
+[8267072d-be1f-4f70-b34a-76b7557a47b9]
+description = "format exceptional ordinal numeral 1"
+
+[4d8753cb-0364-4b29-84b8-4374a4fa2e3f]
+description = "format exceptional ordinal numeral 2"
+
+[8d44c223-3a7e-4f48-a0ca-78e67bf98aa7]
+description = "format exceptional ordinal numeral 3"
+
+[6c4f6c88-b306-4f40-bc78-97cdd583c21a]
+description = "format smallest two digit non-exceptional ordinal numeral 10"
+
+[e257a43f-d2b1-457a-97df-25f0923fc62a]
+description = "format non-exceptional ordinal numeral 11"
+
+[bb1db695-4d64-457f-81b8-4f5a2107e3f4]
+description = "format non-exceptional ordinal numeral 12"
+
+[60a3187c-9403-4835-97de-4f10ebfd63e2]
+description = "format non-exceptional ordinal numeral 13"
+
+[2bdcebc5-c029-4874-b6cc-e9bec80d603a]
+description = "format exceptional ordinal numeral 21"
+
+[74ee2317-0295-49d2-baf0-d56bcefa14e3]
+description = "format exceptional ordinal numeral 62"
+
+[b37c332d-7f68-40e3-8503-e43cbd67a0c4]
+description = "format exceptional ordinal numeral 100"
+
+[0375f250-ce92-4195-9555-00e28ccc4d99]
+description = "format exceptional ordinal numeral 101"
+
+[0d8a4974-9a8a-45a4-aca7-a9fb473c9836]
+description = "format non-exceptional ordinal numeral 112"
+
+[06b62efe-199e-4ce7-970d-4bf73945713f]
+description = "format exceptional ordinal numeral 123"

exercises/practice/line-up/lib/line_up.ex

@@ -0,0 +1,9 @@
+defmodule LineUp do
+  @doc """
+  Formats a full ticket sentence for the given name and number, including
+  the person's name, the ordinal form of the number, and fixed descriptive text.
+  """
+  @spec format(name :: String.t(), number :: pos_integer()) :: String.t()
+  def format(name, number) do
+  end
+end

exercises/practice/line-up/mix.exs

@@ -0,0 +1,27 @@
+defmodule LineUp.MixProject do
+  use Mix.Project
+
+  def project do
+    [
+      app: :line_up,
+      version: "0.1.0",
+      start_permanent: Mix.env() == :prod,
+      deps: deps()
+    ]
+  end
+
+  # Run "mix help compile.app" to learn about applications.
+  def application do
+    [
+      extra_applications: [:logger]
+    ]
+  end
+
+  # Run "mix help deps" to learn about dependencies.
+  defp deps do
+    [
+      # {:dep_from_hexpm, "~> 0.3.0"},
+      # {:dep_from_git, git: "https://github.com/elixir-lang/my_dep.git", tag: "0.1.0"}
+    ]
+  end
+end

exercises/practice/line-up/test/line_up_test.exs

@@ -0,0 +1,115 @@
+defmodule LineUpTest do
+  use ExUnit.Case
+
+  # @tag :pending
+  test "format smallest non-exceptional ordinal numeral 4" do
+    assert LineUp.format("Gianna", 4) ==
+             "Gianna, you are the 4th customer we serve today. Thank you!"
+  end
+
+  @tag :pending
+  test "format greatest single digit non-exceptional ordinal numeral 9" do
+    assert LineUp.format("Maarten", 9) ==
+             "Maarten, you are the 9th customer we serve today. Thank you!"
+  end
+
+  @tag :pending
+  test "format non-exceptional ordinal numeral 5" do
+    assert LineUp.format("Petronila", 5) ==
+             "Petronila, you are the 5th customer we serve today. Thank you!"
+  end
+
+  @tag :pending
+  test "format non-exceptional ordinal numeral 6" do
+    assert LineUp.format("Attakullakulla", 6) ==
+             "Attakullakulla, you are the 6th customer we serve today. Thank you!"
+  end
+
+  @tag :pending
+  test "format non-exceptional ordinal numeral 7" do
+    assert LineUp.format("Kate", 7) == "Kate, you are the 7th customer we serve today. Thank you!"
+  end
+
+  @tag :pending
+  test "format non-exceptional ordinal numeral 8" do
+    assert LineUp.format("Maximiliano", 8) ==
+             "Maximiliano, you are the 8th customer we serve today. Thank you!"
+  end
+
+  @tag :pending
+  test "format exceptional ordinal numeral 1" do
+    assert LineUp.format("Mary", 1) == "Mary, you are the 1st customer we serve today. Thank you!"
+  end
+
+  @tag :pending
+  test "format exceptional ordinal numeral 2" do
+    assert LineUp.format("Haruto", 2) ==
+             "Haruto, you are the 2nd customer we serve today. Thank you!"
+  end
+
+  @tag :pending
+  test "format exceptional ordinal numeral 3" do
+    assert LineUp.format("Henriette", 3) ==
+             "Henriette, you are the 3rd customer we serve today. Thank you!"
+  end
+
+  @tag :pending
+  test "format smallest two digit non-exceptional ordinal numeral 10" do
+    assert LineUp.format("Alvarez", 10) ==
+             "Alvarez, you are the 10th customer we serve today. Thank you!"
+  end
+
+  @tag :pending
+  test "format non-exceptional ordinal numeral 11" do
+    assert LineUp.format("Jacqueline", 11) ==
+             "Jacqueline, you are the 11th customer we serve today. Thank you!"
+  end
+
+  @tag :pending
+  test "format non-exceptional ordinal numeral 12" do
+    assert LineUp.format("Juan", 12) ==
+             "Juan, you are the 12th customer we serve today. Thank you!"
+  end
+
+  @tag :pending
+  test "format non-exceptional ordinal numeral 13" do
+    assert LineUp.format("Patricia", 13) ==
+             "Patricia, you are the 13th customer we serve today. Thank you!"
+  end
+
+  @tag :pending
+  test "format exceptional ordinal numeral 21" do
+    assert LineUp.format("Washi", 21) ==
+             "Washi, you are the 21st customer we serve today. Thank you!"
+  end
+
+  @tag :pending
+  test "format exceptional ordinal numeral 62" do
+    assert LineUp.format("Nayra", 62) ==
+             "Nayra, you are the 62nd customer we serve today. Thank you!"
+  end
+
+  @tag :pending
+  test "format exceptional ordinal numeral 100" do
+    assert LineUp.format("John", 100) ==
+             "John, you are the 100th customer we serve today. Thank you!"
+  end
+
+  @tag :pending
+  test "format exceptional ordinal numeral 101" do
+    assert LineUp.format("Zeinab", 101) ==
+             "Zeinab, you are the 101st customer we serve today. Thank you!"
+  end
+
+  @tag :pending
+  test "format non-exceptional ordinal numeral 112" do
+    assert LineUp.format("Knud", 112) ==
+             "Knud, you are the 112th customer we serve today. Thank you!"
+  end
+
+  @tag :pending
+  test "format exceptional ordinal numeral 123" do
+    assert LineUp.format("Yma", 123) ==
+             "Yma, you are the 123rd customer we serve today. Thank you!"
+  end
+end

exercises/practice/line-up/test/test_helper.exs

@@ -0,0 +1,2 @@
+ExUnit.start()
+ExUnit.configure(exclude: :pending, trace: true)