Created
March 4, 2014 08:01
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| class Node(): | |
| def __init__(self, val): | |
| self.value = val | |
| self.next = None | |
| def __repr__(self): | |
| return "[" + str(self.value) + "," + str(id(self.next)) + "]" | |
| class LinkedList(): | |
| def __init__(self): | |
| self.first = None | |
| self.size = 0 | |
| def add_at_start(self, val): | |
| prev_first = self.first | |
| self.first = Node(val) | |
| self.first.next = prev_first | |
| self.size += 1 | |
| def reverse(self): | |
| prev = None | |
| curr = self.first | |
| while curr != None: | |
| tmp = curr.next | |
| curr.next = prev | |
| prev = curr | |
| curr = tmp | |
| self.first = prev | |
| # a -> b -> c | |
| # a <- b -< c | |
| def matan_print(self): | |
| curr = self.first | |
| while curr != None: | |
| print(curr.value) | |
| curr = curr.next | |
| def string_to_linked_list(st): | |
| l = LinkedList() | |
| for ch in st[::-1]: | |
| l.add_at_start(ch) | |
| return l |
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