[matrix] Add new practice exercise

bin/generate_tests

@@ -85,7 +85,7 @@ def filter_quote(obj) -> str:
     if isinstance(obj, (int, float)):
         return f"{obj}"
     if isinstance(obj, str):
-        obj = obj.replace("\\", "\\\\")
+        obj = obj.replace("\\", "\\\\").replace("\n", "\\n")
         if '"' not in obj:
             return '"' + obj + '"'
         if "'" not in obj:

config.json

@@ -310,6 +310,14 @@
         "prerequisites": [],
         "difficulty": 4
       },
+      {
+        "slug": "matrix",
+        "name": "Matrix",
+        "uuid": "efa33c93-6ea4-4a5f-8e68-89de2e61e72e",
+        "practices": [],
+        "prerequisites": [],
+        "difficulty": 4
+      },
       {
         "slug": "perfect-numbers",
         "name": "Perfect Numbers",

exercises/practice/matrix/.docs/instructions.md

@@ -0,0 +1,38 @@
+# Instructions
+
+Given a string representing a matrix of numbers, return the rows and columns of that matrix.
+
+So given a string with embedded newlines like:
+
+```text
+9 8 7
+5 3 2
+6 6 7
+```
+
+representing this matrix:
+
+```text
+    1  2  3
+  |---------
+1 | 9  8  7
+2 | 5  3  2
+3 | 6  6  7
+```
+
+your code should be able to spit out:
+
+- A list of the rows, reading each row left-to-right while moving top-to-bottom across the rows,
+- A list of the columns, reading each column top-to-bottom while moving from left-to-right.
+
+The rows for our example matrix:
+
+- 9, 8, 7
+- 5, 3, 2
+- 6, 6, 7
+
+And its columns:
+
+- 9, 5, 6
+- 8, 3, 6
+- 7, 2, 7

exercises/practice/matrix/.meta/config.json

@@ -0,0 +1,22 @@
+{
+  "authors": [
+    "IsaacG"
+  ],
+  "files": {
+    "solution": [
+      "matrix.gd"
+    ],
+    "test": [
+      "matrix_test.gd",
+      "run_tests",
+      "lib/test_runner.gd",
+      "project.godot"
+    ],
+    "example": [
+      ".meta/example.gd"
+    ]
+  },
+  "blurb": "Given a string representing a matrix of numbers, return the rows and columns of that matrix.",
+  "source": "Exercise by the JumpstartLab team for students at The Turing School of Software and Design.",
+  "source_url": "https://www.turing.edu/"
+}

exercises/practice/matrix/.meta/example.gd

@@ -0,0 +1,19 @@
+class Matrix:
+	var _matrix = null
+
+	func _init(string):
+		_matrix = []
+		for line in string.split("\n"):
+			var row = []
+			for word in line.split(" "):
+				row.append(int(word))
+			_matrix.append(row)
+
+	func row(number):
+		return _matrix[number - 1]
+
+	func column(number):
+		var col = []
+		for row in _matrix:
+			col.append(row[number - 1])
+		return col

exercises/practice/matrix/.meta/template.j2

@@ -0,0 +1,9 @@
+{% for case in cases %}
+func test_{{ case.func_name }}(solution_script):
+	var matrix = solution_script.Matrix.new({{ case.input.string | quote }})
+	var got = matrix.{{ case.property }}({{ case.input.index | quote }})
+	var want = {{ case.expected | quote }}
+	return [got, want]
+
+{% endfor %}
+

exercises/practice/matrix/.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.
+
+[ca733dab-9d85-4065-9ef6-a880a951dafd]
+description = "extract row from one number matrix"
+
+[5c93ec93-80e1-4268-9fc2-63bc7d23385c]
+description = "can extract row"
+
+[2f1aad89-ad0f-4bd2-9919-99a8bff0305a]
+description = "extract row where numbers have different widths"
+
+[68f7f6ba-57e2-4e87-82d0-ad09889b5204]
+description = "can extract row from non-square matrix with no corresponding column"
+
+[e8c74391-c93b-4aed-8bfe-f3c9beb89ebb]
+description = "extract column from one number matrix"
+
+[7136bdbd-b3dc-48c4-a10c-8230976d3727]
+description = "can extract column"
+
+[ad64f8d7-bba6-4182-8adf-0c14de3d0eca]
+description = "can extract column from non-square matrix with no corresponding row"
+
+[9eddfa5c-8474-440e-ae0a-f018c2a0dd89]
+description = "extract column where numbers have different widths"