Added Game of Life exercise.

SimaDovakin · SimaDovakin · commit 4ca3d0b9b3d3 · 2025-09-30T18:49:48.000+03:00
diff --git a/config.json b/config.json
@@ -479,6 +479,14 @@
         "practices": [],
         "prerequisites": [],
         "difficulty": 7
+      },
+      {
+        "slug": "game-of-life",
+        "name": "Conway's Game of Life",
+        "uuid": "d22b3d88-b1ca-41b1-b00a-0d1ed45de2de",
+        "practices": [],
+        "prerequisites": [],
+        "difficulty": 7
       }
     ]
   },
diff --git a/exercises/practice/game-of-life/.docs/instructions.md b/exercises/practice/game-of-life/.docs/instructions.md
@@ -0,0 +1,11 @@
+# Instructions
+
+After each generation, the cells interact with their eight neighbors, which are cells adjacent horizontally, vertically, or diagonally.
+
+The following rules are applied to each cell:
+
+- Any live cell with two or three live neighbors lives on.
+- Any dead cell with exactly three live neighbors becomes a live cell.
+- All other cells die or stay dead.
+
+Given a matrix of 1s and 0s (corresponding to live and dead cells), apply the rules to each cell, and return the next generation.
diff --git a/exercises/practice/game-of-life/.docs/introduction.md b/exercises/practice/game-of-life/.docs/introduction.md
@@ -0,0 +1,9 @@
+# Introduction
+
+[Conway's Game of Life][game-of-life] is a fascinating cellular automaton created by the British mathematician John Horton Conway in 1970.
+
+The game consists of a two-dimensional grid of cells that can either be "alive" or "dead."
+
+After each generation, the cells interact with their eight neighbors via a set of rules, which define the new generation.
+
+[game-of-life]: https://en.wikipedia.org/wiki/Conway%27s_Game_of_Life
diff --git a/exercises/practice/game-of-life/.meta/config.json b/exercises/practice/game-of-life/.meta/config.json
@@ -0,0 +1,19 @@
+{
+  "authors": [
+    "SimaDovakin"
+  ],
+  "files": {
+    "solution": [
+      "gameOfLife.u"
+    ],
+    "test": [
+      "gameOfLife.test.u"
+    ],
+    "example": [
+      ".meta/examples/gameOfLife.example.u"
+    ]
+  },
+  "blurb": "Implement Conway's Game of Life.",
+  "source": "Wikipedia",
+  "source_url": "https://en.wikipedia.org/wiki/Conway%27s_Game_of_Life"
+}
diff --git a/exercises/practice/game-of-life/.meta/examples/gameOfLife.example.u b/exercises/practice/game-of-life/.meta/examples/gameOfLife.example.u
@@ -0,0 +1,62 @@
+gameOfLife.directions : [(Int, Int)]
+gameOfLife.directions =
+  use base.Int range
+
+  Each.toList do
+    row = range -1 +2 |> each
+    col = range -1 +2 |> each
+    (row, col) !== (+0, +0) |> guard
+    (row, col)
+
+gameOfLife.countAliveNeighbours : Nat -> Nat -> [[Nat]] -> Nat
+gameOfLife.countAliveNeighbours row col matrix =
+  rows = List.size matrix |> Nat.toInt
+  cols =
+    List.head matrix
+      |> Optional.getOrElse []
+      |> List.size
+      |> Nat.toInt
+  accumulateCells acc position =
+    (r, c) = position
+    if Int.inRange +0 rows r && Int.inRange +0 cols c then
+      matrix
+        |> List.at (Int.abs r)
+        |> Optional.getOrElse []
+        |> List.at (Int.abs c)
+        |> Optional.getOrElse 0
+        |> (+) acc
+    else
+      acc
+  positions =
+    List.map
+      (cases (dr, dc) -> (Nat.toInt row + dr, Nat.toInt col + dc))
+      directions
+  foldLeft
+    accumulateCells
+    0
+    positions
+
+gameOfLife.tick : [[Nat]] -> [[Nat]]
+gameOfLife.tick matrix =
+  Each.toList do
+    rows = List.size matrix
+    cols =
+      matrix
+        |> List.head
+        |> getOrElse []
+        |> List.size
+    row = Each.range 0 rows
+    Each.toList do
+      col = Each.range 0 cols
+
+      cell =
+        matrix
+          |> List.at row
+          |> getOrElse []
+          |> List.at col
+          |> getOrElse 0
+      aliveNeighboursCount = countAliveNeighbours row col matrix
+      match (cell, aliveNeighboursCount) with
+        (1, aliveNeighbours) | aliveNeighbours === 2 || aliveNeighbours === 3 -> 1
+        (0, 3) -> 1
+        _ -> 0
diff --git a/exercises/practice/game-of-life/.meta/testAnnotation.json b/exercises/practice/game-of-life/.meta/testAnnotation.json
@@ -0,0 +1,34 @@
+[
+  {
+    "name": "empty matrix",
+    "test_code": "verify do\n  labeled \"empty matrix\" do\n    expected = []\n    actual = tick []\n    label \"expected\" expected\n    label \"actual\" actual\n    ensureEqual expected actual"
+  },
+  {
+    "name": "live cells with zero live neighbors die",
+    "test_code": "verify do\n  labeled \"live cells with zero live neighbors die\" do\n    expected = [\n      [0, 0, 0],\n      [0, 0, 0],\n      [0, 0, 0]\n    ]\n    actual = tick [\n      [0, 0, 0],\n      [0, 1, 0],\n      [0, 0, 0]\n    ]\n    label \"expected\" expected\n    label \"actual\" actual\n    ensureEqual expected actual"
+  },
+  {
+    "name": "live cells with only one live neighbor die",
+    "test_code": "verify do\n  labeled \"live cells with only one live neighbor die\" do\n    expected = [\n      [0, 0, 0],\n      [0, 0, 0],\n      [0, 0, 0]\n    ]\n    actual = tick [\n      [0, 0, 0],\n      [0, 1, 0],\n      [0, 1, 0]\n    ]\n    label \"expected\" expected\n    label \"actual\" actual\n    ensureEqual expected actual"
+  },
+  {
+    "name": "live cells with two live neighbors stay alive",
+    "test_code": "verify do\n  labeled \"live cells with two live neighbors stay alive\" do\n    expected = [\n      [0, 0, 0],\n      [1, 0, 1],\n      [0, 0, 0]\n    ]\n    actual = tick [\n      [1, 0, 1],\n      [1, 0, 1],\n      [1, 0, 1]\n    ]\n    label \"expected\" expected\n    label \"actual\" actual\n    ensureEqual expected actual"
+  },
+  {
+    "name": "live cells with three live neighbors stay alive",
+    "test_code": "verify do\n  labeled \"live cells with three live neighbors stay alive\" do\n    expected = [\n      [0, 0, 0],\n      [1, 0, 0],\n      [1, 1, 0]\n    ]\n    actual = tick [\n      [0, 1, 0],\n      [1, 0, 0],\n      [1, 1, 0]\n    ]\n    label \"expected\" expected\n    label \"actual\" actual\n    ensureEqual expected actual"
+  },
+  {
+    "name": "dead cells with three live neighbors become alive",
+    "test_code": "verify do\n  labeled \"dead cells with three live neighbors become alive\" do\n    expected = [\n      [0, 0, 0],\n      [1, 1, 0],\n      [0, 0, 0]\n    ]\n    actual = tick [\n      [1, 1, 0],\n      [0, 0, 0],\n      [1, 0, 0]\n    ]\n    label \"expected\" expected\n    label \"actual\" actual\n    ensureEqual expected actual"
+  },
+  {
+    "name": "live cells with four or more neighbors die",
+    "test_code": "verify do\n  labeled \"live cells with four or more neighbors die\" do\n    expected = [\n      [1, 0, 1],\n      [0, 0, 0],\n      [1, 0, 1]\n    ]\n    actual = tick [\n      [1, 1, 1],\n      [1, 1, 1],\n      [1, 1, 1]\n    ]\n    label \"expected\" expected\n    label \"actual\" actual\n    ensureEqual expected actual"
+  },
+  {
+    "name": "bigger matrix",
+    "test_code": "verify do\n  labeled \"bigger matrix\" do\n    expected = [\n      [1, 1, 0, 1, 1, 0, 0, 0],\n      [0, 0, 0, 0, 0, 1, 1, 0],\n      [1, 0, 1, 1, 1, 1, 0, 1],\n      [1, 0, 0, 0, 0, 0, 0, 1],\n      [1, 1, 0, 0, 1, 0, 0, 1],\n      [1, 1, 0, 1, 0, 0, 0, 1],\n      [1, 0, 0, 0, 0, 0, 0, 0],\n      [0, 0, 0, 0, 0, 0, 1, 1]\n    ]\n    actual = tick [\n      [1, 1, 0, 1, 1, 0, 0, 0],\n      [1, 0, 1, 1, 0, 0, 0, 0],\n      [1, 1, 1, 0, 0, 1, 1, 1],\n      [0, 0, 0, 0, 0, 1, 1, 0],\n      [1, 0, 0, 0, 1, 1, 0, 0],\n      [1, 1, 0, 0, 0, 1, 1, 1],\n      [0, 0, 1, 0, 1, 0, 0, 1],\n      [1, 0, 0, 0, 0, 0, 1, 1]\n    ]\n    label \"expected\" expected\n    label \"actual\" actual\n    ensureEqual expected actual"
+  }
+]
diff --git a/exercises/practice/game-of-life/.meta/testLoader.md b/exercises/practice/game-of-life/.meta/testLoader.md
@@ -0,0 +1,9 @@
+# Testing transcript
+
+```ucm
+scratch/main> load ./gameOfLife.u
+scratch/main> add
+scratch/main> load ./gameOfLife.test.u
+scratch/main> add
+scratch/main> move.term gameOfLife.tests tests
+```
diff --git a/exercises/practice/game-of-life/.meta/tests.toml b/exercises/practice/game-of-life/.meta/tests.toml
@@ -0,0 +1,34 @@
+# 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.
+
+[ae86ea7d-bd07-4357-90b3-ac7d256bd5c5]
+description = "empty matrix"
+
+[4ea5ccb7-7b73-4281-954a-bed1b0f139a5]
+description = "live cells with zero live neighbors die"
+
+[df245adc-14ff-4f9c-b2ae-f465ef5321b2]
+description = "live cells with only one live neighbor die"
+
+[2a713b56-283c-48c8-adae-1d21306c80ae]
+description = "live cells with two live neighbors stay alive"
+
+[86d5c5a5-ab7b-41a1-8907-c9b3fc5e9dae]
+description = "live cells with three live neighbors stay alive"
+
+[015f60ac-39d8-4c6c-8328-57f334fc9f89]
+description = "dead cells with three live neighbors become alive"
+
+[2ee69c00-9d41-4b8b-89da-5832e735ccf1]
+description = "live cells with four or more neighbors die"
+
+[a79b42be-ed6c-4e27-9206-43da08697ef6]
+description = "bigger matrix"
diff --git a/exercises/practice/game-of-life/gameOfLife.test.u b/exercises/practice/game-of-life/gameOfLife.test.u
@@ -0,0 +1,140 @@
+gameOfLife.tick.tests.ex1 = verify do
+  labeled "empty matrix" do
+    expected = []
+    actual = tick []
+    label "expected" expected
+    label "actual" actual
+    ensureEqual expected actual
+
+gameOfLife.tick.tests.ex2 = verify do
+  labeled "live cells with zero live neighbors die" do
+    expected = [
+      [0, 0, 0],
+      [0, 0, 0],
+      [0, 0, 0]
+    ]
+    actual = tick [
+      [0, 0, 0],
+      [0, 1, 0],
+      [0, 0, 0]
+    ]
+    label "expected" expected
+    label "actual" actual
+    ensureEqual expected actual
+
+gameOfLife.tick.tests.ex3 = verify do
+  labeled "live cells with only one live neighbor die" do
+    expected = [
+      [0, 0, 0],
+      [0, 0, 0],
+      [0, 0, 0]
+    ]
+    actual = tick [
+      [0, 0, 0],
+      [0, 1, 0],
+      [0, 1, 0]
+    ]
+    label "expected" expected
+    label "actual" actual
+    ensureEqual expected actual
+
+gameOfLife.tick.tests.ex4 = verify do
+  labeled "live cells with two live neighbors stay alive" do
+    expected = [
+      [0, 0, 0],
+      [1, 0, 1],
+      [0, 0, 0]
+    ]
+    actual = tick [
+      [1, 0, 1],
+      [1, 0, 1],
+      [1, 0, 1]
+    ]
+    label "expected" expected
+    label "actual" actual
+    ensureEqual expected actual
+
+gameOfLife.tick.tests.ex5 = verify do
+  labeled "live cells with three live neighbors stay alive" do
+    expected = [
+      [0, 0, 0],
+      [1, 0, 0],
+      [1, 1, 0]
+    ]
+    actual = tick [
+      [0, 1, 0],
+      [1, 0, 0],
+      [1, 1, 0]
+    ]
+    label "expected" expected
+    label "actual" actual
+    ensureEqual expected actual
+
+gameOfLife.tick.tests.ex6 = verify do
+  labeled "dead cells with three live neighbors become alive" do
+    expected = [
+      [0, 0, 0],
+      [1, 1, 0],
+      [0, 0, 0]
+    ]
+    actual = tick [
+      [1, 1, 0],
+      [0, 0, 0],
+      [1, 0, 0]
+    ]
+    label "expected" expected
+    label "actual" actual
+    ensureEqual expected actual
+
+gameOfLife.tick.tests.ex7 = verify do
+  labeled "live cells with four or more neighbors die" do
+    expected = [
+      [1, 0, 1],
+      [0, 0, 0],
+      [1, 0, 1]
+    ]
+    actual = tick [
+      [1, 1, 1],
+      [1, 1, 1],
+      [1, 1, 1]
+    ]
+    label "expected" expected
+    label "actual" actual
+    ensureEqual expected actual
+
+gameOfLife.tick.tests.ex8 = verify do
+  labeled "bigger matrix" do
+    expected = [
+      [1, 1, 0, 1, 1, 0, 0, 0],
+      [0, 0, 0, 0, 0, 1, 1, 0],
+      [1, 0, 1, 1, 1, 1, 0, 1],
+      [1, 0, 0, 0, 0, 0, 0, 1],
+      [1, 1, 0, 0, 1, 0, 0, 1],
+      [1, 1, 0, 1, 0, 0, 0, 1],
+      [1, 0, 0, 0, 0, 0, 0, 0],
+      [0, 0, 0, 0, 0, 0, 1, 1]
+    ]
+    actual = tick [
+      [1, 1, 0, 1, 1, 0, 0, 0],
+      [1, 0, 1, 1, 0, 0, 0, 0],
+      [1, 1, 1, 0, 0, 1, 1, 1],
+      [0, 0, 0, 0, 0, 1, 1, 0],
+      [1, 0, 0, 0, 1, 1, 0, 0],
+      [1, 1, 0, 0, 0, 1, 1, 1],
+      [0, 0, 1, 0, 1, 0, 0, 1],
+      [1, 0, 0, 0, 0, 0, 1, 1]
+    ]
+    label "expected" expected
+    label "actual" actual
+    ensureEqual expected actual
+
+test> gameOfLife.tests = join [
+  gameOfLife.tick.tests.ex1,
+  gameOfLife.tick.tests.ex2,
+  gameOfLife.tick.tests.ex3,
+  gameOfLife.tick.tests.ex4,
+  gameOfLife.tick.tests.ex5,
+  gameOfLife.tick.tests.ex6,
+  gameOfLife.tick.tests.ex7,
+  gameOfLife.tick.tests.ex8,
+]
diff --git a/exercises/practice/game-of-life/gameOfLife.u b/exercises/practice/game-of-life/gameOfLife.u
@@ -0,0 +1,2 @@
+gameOfLife.tick : [[Nat]] -> [[Nat]]
+gameOfLife.tick matrix = todo "implement tick"

Original file line number	Diff line number	Diff line change
`@@ -0,0 +1,2 @@`
	`1`	`+gameOfLife.tick : [[Nat]] -> [[Nat]]`
	`2`	`+gameOfLife.tick matrix = todo "implement tick"`