RogerBW solutions for challenge no. 321

1 files changed, 28 insertions, 0 deletions

diff --git a/challenge-321/roger-bell-west/python/ch-2.py b/challenge-321/roger-bell-west/python/ch-2.py
new file mode 100755
index 0000000000..baf1c7a1c7
--- /dev/null
+++ b/challenge-321/roger-bell-west/python/ch-2.py
@@ -0,0 +1,28 @@
+#! /usr/bin/python3
+
+def backspacecompare(a, b):
+  sa = []
+  for i in [a, b]:
+    oa = []
+    for c in i:
+      if c == "#":
+        oa.pop()
+      else:
+        oa.append(c)
+    sa.append("".join(oa))
+  return sa[0] == sa[1]
+
+import unittest
+
+class TestBackspacecompare(unittest.TestCase):
+
+  def test_ex1(self):
+    self.assertEqual(backspacecompare("ab#c", "ad#c"), True, 'example 1')
+
+  def test_ex2(self):
+    self.assertEqual(backspacecompare("ab##", "a#b#"), True, 'example 2')
+
+  def test_ex3(self):
+    self.assertEqual(backspacecompare("a#b", "c"), False, 'example 3')
+
+unittest.main()