On Tue, 23 Aug 2005 20:58:11 -0700, Randy Bush <[EMAIL PROTECTED]> wrote:
>i am trying to insert into a singly linked list
>
> hold = self.next
> self.next = DaClass(value)
> self.next.next = hold
>
>but i suspect (from print statement insertions) that the result
>is not as i expect. as the concept and code should be very
>common, as i am too old for pride, i thought i would ask.
>
I think you're fine. Here's some possible context for your code:
>>> class DaClass(object):
... def __init__(self, value):
... self.value = value
... self.next = None
... def values(self):
... while True:
... yield self.value
... if self.next is None: break
... self = self.next
... def insert(self, value):
... hold = self.next
... self.next = DaClass(value)
... self.next.next = hold
... return self
... def __repr__(self):
... return '<DaClass %s>'%(' -> '.join(map(repr, self.values())))
...
...
>>> sll = DaClass(1)
>>> sll
<DaClass 1>
>>> sll.insert(2)
<DaClass 1 -> 2>
>>> sll
<DaClass 1 -> 2>
>>> sll.insert('a')
<DaClass 1 -> 'a' -> 2>
>>> sll.next
<DaClass 'a' -> 2>
>>> sll.next.insert('b')
<DaClass 'a' -> 'b' -> 2>
>>> sll
<DaClass 1 -> 'a' -> 'b' -> 2>
Regards,
Bengt Richter
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