palindrome iteration

Jussi Piitulainen jpiitula at ling.helsinki.fi
Fri Aug 27 21:43:10 CEST 2010


Dave Angel writes:

> Jussi Piitulainen wrote:
>> Ian writes:
>>> Of course, the simpler way is to use the definition of a
>>> Palindrome as the same backwards and forwards.
>>>
>>> def isPalindrome(pal)
>>>      return pal == pal.reverse
>>
>> Agreed. But is there any nicer way to spell .reverse than [::-1] in
>> Python? There is .swapcase() but no .reverse(), right?
>>
> There can't be a .reverse() method on string, because it's
> immutable. You could use
> 
>     "".join(reversed(pal))
> 
> but I'd prefer  pal[::-1]  as I said earlier.

There could easily be a .reverse() method on strings. It would return
the reversed string, like .swapcase() returns the swapcased string.



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