another coding bat

Author: PythonCHB

source/solutions/codingbat/List-2/sum13.py

@@ -0,0 +1,64 @@
+def sum13(l):
+    tot = 0
+    prev = 0
+    for i in range(len(l)):
+        if l[i] != 13 and prev != 13:
+            tot += l[i]
+        prev = l[i]
+    return tot
+
+
+# def sum13(l):
+#     prev, tot = 0, 0
+#     for i in l:
+#         if i != 13 and prev != 13:
+#             tot += i
+#         prev = i
+#     return tot
+
+
+# def sum13(l):
+#     tot = 0
+#     i = 0
+#     while i < len(l):
+#         if l[i] != 13:
+#             tot += l[i]
+#             i += 1
+#         else:
+#             i += 2
+#     return tot
+
+
+# def sum13(l):
+#     tot = 0
+#     l_iter = iter(l)
+#     for i in l_iter:
+#         if i == 13:
+#             try:
+#                 next(l_iter)
+#             except StopIteration:
+#                 break
+#         else:
+#             tot += i
+#     return tot
+
+
+if __name__ == "__main__":
+
+    assert sum13([1, 2, 2, 1]) == 6
+    assert sum13([1, 1]) == 2
+    assert sum13([1, 2, 2, 1, 13]) == 6
+    assert sum13([1, 2, 13, 2, 1, 13]) == 4
+    assert sum13([13, 1, 2, 13, 2, 1, 13]) == 3
+    assert sum13([]) == 0
+    assert sum13([13]) == 0
+    assert sum13([13, 13]) == 0
+    assert sum13([13, 0, 13]) == 0
+    assert sum13([13, 1, 13]) == 0
+    assert sum13([5, 7, 2]) == 14
+    assert sum13([5, 13, 2]) == 5
+    assert sum13([0]) == 0
+    assert sum13([13, 0]) == 0
+
+    print("all asserts passed")
+