From fabf1c9334a86d55be133da851cafccc9e6319fe Mon Sep 17 00:00:00 2001
From: William Carroll <wpcarro@gmail.com>
Date: Wed, 12 Feb 2020 16:58:29 +0000
Subject: Tidy up structure of briefcase

I had a spare fifteen minutes and decided that I should tidy up my
monorepo. The work of tidying up is not finished; this is a small step in the
right direction.

TL;DR
- Created a tools directory
- Created a scratch directory (see README.md for more information)
- Added README.md to third_party
- Renamed delete_dotfile_symlinks -> symlinkManager
- Packaged symlinkManager as an executable symlink-mgr using buildGo
---
 .../permutation-palindrome.py                      | 49 ++++++++++++++++++++++
 1 file changed, 49 insertions(+)
 create mode 100644 scratch/data_structures_and_algorithms/permutation-palindrome.py

(limited to 'scratch/data_structures_and_algorithms/permutation-palindrome.py')

diff --git a/scratch/data_structures_and_algorithms/permutation-palindrome.py b/scratch/data_structures_and_algorithms/permutation-palindrome.py
new file mode 100644
index 000000000000..0a2136a408f2
--- /dev/null
+++ b/scratch/data_structures_and_algorithms/permutation-palindrome.py
@@ -0,0 +1,49 @@
+from collections import Counter
+import unittest
+
+
+################################################################################
+# Impl
+################################################################################
+# palindromifiable :: String -> Boolean
+def has_palindrome_permutation(x):
+    bag = Counter(x)
+    odd_entries_ct = 0
+
+    for _, y in bag.items():
+        if y % 2 != 0:
+            odd_entries_ct += 1
+
+    return odd_entries_ct in {0, 1}
+
+
+################################################################################
+# Tests
+################################################################################
+class Test(unittest.TestCase):
+    def test_permutation_with_odd_number_of_chars(self):
+        result = has_palindrome_permutation('aabcbcd')
+        self.assertTrue(result)
+
+    def test_permutation_with_even_number_of_chars(self):
+        result = has_palindrome_permutation('aabccbdd')
+        self.assertTrue(result)
+
+    def test_no_permutation_with_odd_number_of_chars(self):
+        result = has_palindrome_permutation('aabcd')
+        self.assertFalse(result)
+
+    def test_no_permutation_with_even_number_of_chars(self):
+        result = has_palindrome_permutation('aabbcd')
+        self.assertFalse(result)
+
+    def test_empty_string(self):
+        result = has_palindrome_permutation('')
+        self.assertTrue(result)
+
+    def test_one_character_string(self):
+        result = has_palindrome_permutation('a')
+        self.assertTrue(result)
+
+
+unittest.main(verbosity=2)
-- 
cgit 1.4.1