Merge pull request #11900 from simongreen-net/master

sgreen solutions to challenge 317

3 files changed, 82 insertions, 0 deletions

diff --git a/challenge-317/sgreen/python/ch-1.py b/challenge-317/sgreen/python/ch-1.py
new file mode 100755
index 0000000000..3300ed4a9d
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+++ b/challenge-317/sgreen/python/ch-1.py
@@ -0,0 +1,21 @@
+#!/usr/bin/env python3
+
+import sys
+
+
+def is_acronyms(array: list, word: str) -> bool:
+    # Make up the acronym for the first letter in each word
+    acronym = ''.join(s[0] for s in array)
+
+    # Compare it to the supplied string
+    return acronym.lower() == word.lower()
+
+
+def main():
+    # The last string is the word (acronym)
+    result = is_acronyms(sys.argv[1:-1], sys.argv[-1])
+    print(result)
+
+
+if __name__ == '__main__':
+    main()
diff --git a/challenge-317/sgreen/python/ch-2.py b/challenge-317/sgreen/python/ch-2.py
new file mode 100755
index 0000000000..b855287fdc
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+++ b/challenge-317/sgreen/python/ch-2.py
@@ -0,0 +1,37 @@
+#!/usr/bin/env python3
+
+from collections import Counter
+import sys
+
+
+def friendly_strings(str1: str, str2: str) -> bool:
+    # Check strings are the same length
+    if len(str1) != len(str2):
+        return False
+
+    if str1 == str2:
+        # We can still swap two characters if there are any letters that
+        #  appear two or more times
+        freq = Counter(str1)
+        return any(i for i in freq.values() if i > 1)
+
+    # Find characters that are different
+    differences = [ i for i in range(len(str1)) if str1[i] != str2[i]]
+
+    if len(differences) == 2:
+        # Check that the letters at each position were switched
+        pos1, pos2 = differences
+        if str1[pos1] == str2[pos2] and str2[pos1] == str1[pos2]:
+            return True
+
+    return False
+
+
+
+def main():
+    result = friendly_strings(sys.argv[1], sys.argv[2])
+    print(result)
+
+
+if __name__ == '__main__':
+    main()
diff --git a/challenge-317/sgreen/python/test.py b/challenge-317/sgreen/python/test.py
new file mode 100755
index 0000000000..7719735c43
--- /dev/null
+++ b/challenge-317/sgreen/python/test.py
@@ -0,0 +1,24 @@
+#!/usr/bin/env python3
+
+import unittest
+ch_1 = __import__('ch-1')
+ch_2 = __import__('ch-2')
+
+
+class TestClass(unittest.TestCase):
+    def test_ch_1(self):
+        self.assertTrue(ch_1.is_acronyms(["Perl", "Weekly", "Challenge"], "PWC"))
+        self.assertTrue(ch_1.is_acronyms(["Bob", "Charlie", "Joe"], "BCJ"))
+        self.assertFalse(ch_1.is_acronyms(["Morning", "Good"], "MM"))
+
+    def test_ch_2(self):
+        self.assertTrue(ch_2.friendly_strings("desc", "dsec"))
+        self.assertTrue(ch_2.friendly_strings("fcyn", "fcny"))
+        self.assertFalse(ch_2.friendly_strings("poo", "eop"))
+        self.assertTrue(ch_2.friendly_strings("stripe", "sprite"))
+        self.assertTrue(ch_2.friendly_strings("bitter", "bitter"))
+        self.assertFalse(ch_2.friendly_strings("biter", "biter"))
+
+
+if __name__ == '__main__':
+    unittest.main()