From 2b42d3aaf1e9c8688142ce0e957e95b245e0dedf Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Andr=C3=A1s=20B=20Nagy?=
 <20251272+BNAndras@users.noreply.github.com>
Date: Mon, 13 Oct 2025 21:48:53 -0700
Subject: [PATCH] Add `line-up` exercise

---
 config.json                                   |  8 ++
 .../practice/line-up/.docs/instructions.md    | 19 +++++
 .../practice/line-up/.docs/introduction.md    |  7 ++
 exercises/practice/line-up/.meta/config.json  | 19 +++++
 .../practice/line-up/.meta/example.coffee     | 20 +++++
 exercises/practice/line-up/.meta/tests.toml   | 67 ++++++++++++++++
 exercises/practice/line-up/line-up.coffee     |  4 +
 .../practice/line-up/line-up.spec.coffee      | 78 +++++++++++++++++++
 8 files changed, 222 insertions(+)
 create mode 100644 exercises/practice/line-up/.docs/instructions.md
 create mode 100644 exercises/practice/line-up/.docs/introduction.md
 create mode 100644 exercises/practice/line-up/.meta/config.json
 create mode 100644 exercises/practice/line-up/.meta/example.coffee
 create mode 100644 exercises/practice/line-up/.meta/tests.toml
 create mode 100644 exercises/practice/line-up/line-up.coffee
 create mode 100644 exercises/practice/line-up/line-up.spec.coffee

diff --git a/config.json b/config.json
index c2934dc..50f13c8 100644
--- a/config.json
+++ b/config.json
@@ -285,6 +285,14 @@
         "prerequisites": [],
         "difficulty": 2
       },
+      {
+        "slug": "line-up",
+        "name": "Line Up",
+        "uuid": "e73766c8-49bc-46ae-a814-630f02cb0d60",
+        "practices": [],
+        "prerequisites": [],
+        "difficulty": 2
+      },
       {
         "slug": "linked-list",
         "name": "Linked List",
diff --git a/exercises/practice/line-up/.docs/instructions.md b/exercises/practice/line-up/.docs/instructions.md
new file mode 100644
index 0000000..fb41d4c
--- /dev/null
+++ b/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 (except for 11) → `"st"`
+- Numbers ending in 2 (except for 12) → `"nd"`
+- Numbers ending in 3 (except for 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
diff --git a/exercises/practice/line-up/.docs/introduction.md b/exercises/practice/line-up/.docs/introduction.md
new file mode 100644
index 0000000..ea07268
--- /dev/null
+++ b/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.
diff --git a/exercises/practice/line-up/.meta/config.json b/exercises/practice/line-up/.meta/config.json
new file mode 100644
index 0000000..3912afa
--- /dev/null
+++ b/exercises/practice/line-up/.meta/config.json
@@ -0,0 +1,19 @@
+{
+  "authors": [
+    "BNAndras"
+  ],
+  "files": {
+    "solution": [
+      "line-up.coffee"
+    ],
+    "test": [
+      "line-up.spec.coffee"
+    ],
+    "example": [
+      ".meta/example.coffee"
+    ]
+  },
+  "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"
+}
diff --git a/exercises/practice/line-up/.meta/example.coffee b/exercises/practice/line-up/.meta/example.coffee
new file mode 100644
index 0000000..47e2af5
--- /dev/null
+++ b/exercises/practice/line-up/.meta/example.coffee
@@ -0,0 +1,20 @@
+class Lineup
+  @format: (name, number) ->
+    suffix = @getSuffix number
+    "#{name}, you are the #{number}#{suffix} customer we serve today. Thank you!"
+
+  @getSuffix: (number) ->
+    mod100 = number % 100
+    mod10 = number % 10
+    if mod100 in [11, 12, 13]
+        'th'
+    else if mod10 is 1
+        'st'
+    else if mod10 is 2
+        'nd'
+    else if mod10 is 3
+        'rd'
+    else
+        'th'
+
+module.exports = Lineup
diff --git a/exercises/practice/line-up/.meta/tests.toml b/exercises/practice/line-up/.meta/tests.toml
new file mode 100644
index 0000000..36fdf1d
--- /dev/null
+++ b/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"
diff --git a/exercises/practice/line-up/line-up.coffee b/exercises/practice/line-up/line-up.coffee
new file mode 100644
index 0000000..274076c
--- /dev/null
+++ b/exercises/practice/line-up/line-up.coffee
@@ -0,0 +1,4 @@
+class Lineup
+  @format: (name, number) ->
+
+module.exports = Lineup
diff --git a/exercises/practice/line-up/line-up.spec.coffee b/exercises/practice/line-up/line-up.spec.coffee
new file mode 100644
index 0000000..caa8b3e
--- /dev/null
+++ b/exercises/practice/line-up/line-up.spec.coffee
@@ -0,0 +1,78 @@
+Lineup = require './line-up'
+
+describe 'Lineup', ->
+  it 'format smallest non-exceptional ordinal numeral 4', ->
+    result = Lineup.format 'Gianna', 4
+    expect(result).toEqual 'Gianna, you are the 4th customer we serve today. Thank you!'
+
+  xit 'format greatest single digit non-exceptional ordinal numeral 9', ->
+    result = Lineup.format 'Maarten', 9
+    expect(result).toEqual 'Maarten, you are the 9th customer we serve today. Thank you!'
+
+  xit 'format non-exceptional ordinal numeral 5', ->
+    result = Lineup.format 'Petronila', 5
+    expect(result).toEqual 'Petronila, you are the 5th customer we serve today. Thank you!'
+
+  xit 'format non-exceptional ordinal numeral 6', ->
+    result = Lineup.format 'Attakullakulla', 6
+    expect(result).toEqual 'Attakullakulla, you are the 6th customer we serve today. Thank you!'
+
+  xit 'format non-exceptional ordinal numeral 7', ->
+    result = Lineup.format 'Kate', 7
+    expect(result).toEqual 'Kate, you are the 7th customer we serve today. Thank you!'
+
+  xit 'format non-exceptional ordinal numeral 8', ->
+    result = Lineup.format 'Maximiliano', 8
+    expect(result).toEqual 'Maximiliano, you are the 8th customer we serve today. Thank you!'
+
+  xit 'format exceptional ordinal numeral 1', ->
+    result = Lineup.format 'Mary', 1
+    expect(result).toEqual 'Mary, you are the 1st customer we serve today. Thank you!'
+
+  xit 'format exceptional ordinal numeral 2', ->
+    result = Lineup.format 'Haruto', 2
+    expect(result).toEqual 'Haruto, you are the 2nd customer we serve today. Thank you!'
+
+  xit 'format exceptional ordinal numeral 3', ->
+    result = Lineup.format 'Henriette', 3
+    expect(result).toEqual 'Henriette, you are the 3rd customer we serve today. Thank you!'
+
+  xit 'format smallest two digit non-exceptional ordinal numeral 10', ->
+    result = Lineup.format 'Alvarez', 10
+    expect(result).toEqual 'Alvarez, you are the 10th customer we serve today. Thank you!'
+
+  xit 'format non-exceptional ordinal numeral 11', ->
+    result = Lineup.format 'Jacqueline', 11
+    expect(result).toEqual 'Jacqueline, you are the 11th customer we serve today. Thank you!'
+
+  xit 'format non-exceptional ordinal numeral 12', ->
+    result = Lineup.format 'Juan', 12
+    expect(result).toEqual 'Juan, you are the 12th customer we serve today. Thank you!'
+
+  xit 'format non-exceptional ordinal numeral 13', ->
+    result = Lineup.format 'Patricia', 13
+    expect(result).toEqual 'Patricia, you are the 13th customer we serve today. Thank you!'
+
+  xit 'format exceptional ordinal numeral 21', ->
+    result = Lineup.format 'Washi', 21
+    expect(result).toEqual 'Washi, you are the 21st customer we serve today. Thank you!'
+
+  xit 'format exceptional ordinal numeral 62', ->
+    result = Lineup.format 'Nayra', 62
+    expect(result).toEqual 'Nayra, you are the 62nd customer we serve today. Thank you!'
+
+  xit 'format exceptional ordinal numeral 100', ->
+    result = Lineup.format 'John', 100
+    expect(result).toEqual 'John, you are the 100th customer we serve today. Thank you!'
+
+  xit 'format exceptional ordinal numeral 101', ->
+    result = Lineup.format 'Zeinab', 101
+    expect(result).toEqual 'Zeinab, you are the 101st customer we serve today. Thank you!'
+
+  xit 'format non-exceptional ordinal numeral 112', ->
+    result = Lineup.format 'Knud', 112
+    expect(result).toEqual 'Knud, you are the 112th customer we serve today. Thank you!'
+
+  xit 'format exceptional ordinal numeral 123', ->
+    result = Lineup.format 'Yma', 123
+    expect(result).toEqual 'Yma, you are the 123rd customer we serve today. Thank you!'