Merge branch 'master' into add_kmeans++

Author: leolamien

.pre-commit-config.yaml

@@ -1,3 +1,6 @@
+ci:
+  autoupdate_schedule: monthly
+
 repos:
   - repo: https://github.com/pre-commit/pre-commit-hooks
     rev: v6.0.0
@@ -16,7 +19,7 @@ repos:
       - id: auto-walrus
 
   - repo: https://github.com/astral-sh/ruff-pre-commit
-    rev: v0.13.1
+    rev: v0.13.2
     hooks:
       - id: ruff-check
       - id: ruff-format

data_structures/arrays/sudoku_solver.py

@@ -11,6 +11,19 @@
 def cross(items_a, items_b):
     """
     Cross product of elements in A and elements in B.
+
+    >>> cross('AB', '12')
+    ['A1', 'A2', 'B1', 'B2']
+    >>> cross('ABC', '123')
+    ['A1', 'A2', 'A3', 'B1', 'B2', 'B3', 'C1', 'C2', 'C3']
+    >>> cross('ABC', '1234')
+    ['A1', 'A2', 'A3', 'A4', 'B1', 'B2', 'B3', 'B4', 'C1', 'C2', 'C3', 'C4']
+    >>> cross('', '12')
+    []
+    >>> cross('A', '')
+    []
+    >>> cross('', '')
+    []
     """
     return [a + b for a in items_a for b in items_b]