Created
July 9, 2016 10:59
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reverse a string using stack
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| class Stack: | |
| def __init__(self): | |
| self.items = [] | |
| def push(self, item): | |
| self.items.append(item) | |
| def pop(self): | |
| return self.items.pop() | |
| def peek(self): | |
| return self.items[0] | |
| def isEmpty(self): | |
| return len(self.items) == 0 | |
| def reverse(text): | |
| s = Stack() | |
| for c in text: | |
| s.push(c) | |
| revText = "" | |
| while not s.isEmpty(): | |
| revText += s.pop() | |
| return revText | |
| ##test | |
| print(reverse("abcdef")) |
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