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Re: A curious bit of code...

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To python-list@python.org
From Mark Lawrence <breamoreboy@yahoo.co.uk>
Subject Re: A curious bit of code...
Date Thu, 13 Feb 2014 19:32:17 +0000
References <4cc09129-43ee-4205-a24c-03f92b594abc@googlegroups.com> <ldj59s$iip$1@ger.gmane.org> <52FD1B01.80200@stoneleaf.us> <ldj677$oos$2@ger.gmane.org>
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On 13/02/2014 19:25, Neil Cerutti wrote:
> On 2014-02-13, Ethan Furman <ethan@stoneleaf.us> wrote:
>> On 02/13/2014 11:09 AM, Mark Lawrence wrote:
>>> All I can say is that if you're worried about the speed of a
>>> single line of code like the above then you've got problems.
>>> Having said that, I suspect that using an index to extract a
>>> single character has to be faster than using a slice, but I
>>> haven't run these through a profiler yet :)
>>
>> The problem with using indices in the code sample is that if
>> the string is 0 or 1 characters long you'll get an exception
>> instead of a False.
>
> There will be an exception only if it is zero-length. But good
> point! That's a pretty sneaky way to avoid checking for a
> zero-length string. Is it a popular idiom?
>

I hope not.

-- 
My fellow Pythonistas, ask not what our language can do for you, ask 
what you can do for our language.

Mark Lawrence

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Thread

A curious bit of code... forman.simon@gmail.com - 2014-02-13 10:37 -0800
  Re: A curious bit of code... Roy Smith <roy@panix.com> - 2014-02-13 13:45 -0500
  Re: A curious bit of code... Ethan Furman <ethan@stoneleaf.us> - 2014-02-13 10:45 -0800
  Re: A curious bit of code... Mark Lawrence <breamoreboy@yahoo.co.uk> - 2014-02-13 19:09 +0000
  Re: A curious bit of code... Alain Ketterlin <alain@dpt-info.u-strasbg.fr> - 2014-02-13 20:05 +0100
  Re: A curious bit of code... Neil Cerutti <neilc@norwich.edu> - 2014-02-13 19:17 +0000
  Re: A curious bit of code... Ethan Furman <ethan@stoneleaf.us> - 2014-02-13 11:20 -0800
    Re: A curious bit of code... Roy Smith <roy@panix.com> - 2014-02-13 14:28 -0500
  Re: A curious bit of code... Ethan Furman <ethan@stoneleaf.us> - 2014-02-13 11:25 -0800
  Re: A curious bit of code... Neil Cerutti <neilc@norwich.edu> - 2014-02-13 19:25 +0000
  Re: A curious bit of code... Mark Lawrence <breamoreboy@yahoo.co.uk> - 2014-02-13 19:32 +0000
  Re: A curious bit of code... Peter Otten <__peter__@web.de> - 2014-02-13 20:43 +0100
    Re: A curious bit of code... Marko Rauhamaa <marko@pacujo.net> - 2014-02-13 21:56 +0200
  Re: A curious bit of code... Ethan Furman <ethan@stoneleaf.us> - 2014-02-13 11:23 -0800
  Re: A curious bit of code... Neil Cerutti <neilc@norwich.edu> - 2014-02-13 19:51 +0000
  Re: A curious bit of code... Ethan Furman <ethan@stoneleaf.us> - 2014-02-13 11:59 -0800
  Re: A curious bit of code... Zachary Ware <zachary.ware+pylist@gmail.com> - 2014-02-13 13:59 -0600
  Re: A curious bit of code... Chris Angelico <rosuav@gmail.com> - 2014-02-14 07:29 +1100
  Re: A curious bit of code... Tim Chase <python.list@tim.thechases.com> - 2014-02-13 14:39 -0600
  Re: A curious bit of code... Emile van Sebille <emile@fenx.com> - 2014-02-13 12:55 -0800
    Re: A curious bit of code... Roy Smith <roy@panix.com> - 2014-02-13 16:24 -0500
      Re: A curious bit of code... Ethan Furman <ethan@stoneleaf.us> - 2014-02-13 16:23 -0800
  Re: A curious bit of code... Chris Angelico <rosuav@gmail.com> - 2014-02-14 08:01 +1100
  Re: A curious bit of code... Neil Cerutti <neilc@norwich.edu> - 2014-02-13 21:01 +0000
  Re: A curious bit of code... Peter Otten <__peter__@web.de> - 2014-02-13 22:06 +0100
  Re: A curious bit of code... Chris Angelico <rosuav@gmail.com> - 2014-02-14 08:10 +1100
  Re: A curious bit of code... Mark Lawrence <breamoreboy@yahoo.co.uk> - 2014-02-13 21:14 +0000
  Re: A curious bit of code... Zachary Ware <zachary.ware+pylist@gmail.com> - 2014-02-13 15:20 -0600
  Re: A curious bit of code... Zachary Ware <zachary.ware+pylist@gmail.com> - 2014-02-13 15:19 -0600
  Re: A curious bit of code... Emile van Sebille <emile@fenx.com> - 2014-02-13 13:23 -0800
  Re: A curious bit of code... Chris Angelico <rosuav@gmail.com> - 2014-02-14 08:31 +1100
    Re: A curious bit of code... Roy Smith <roy@panix.com> - 2014-02-13 16:38 -0500
  Re: A curious bit of code... Zachary Ware <zachary.ware+pylist@gmail.com> - 2014-02-13 15:47 -0600
  Re: A curious bit of code... Serhiy Storchaka <storchaka@gmail.com> - 2014-02-13 23:49 +0200
    Re: A curious bit of code... Roy Smith <roy@panix.com> - 2014-02-13 16:51 -0500
  Re: A curious bit of code... Ethan Furman <ethan@stoneleaf.us> - 2014-02-13 13:33 -0800
  Re: A curious bit of code... Chris Angelico <rosuav@gmail.com> - 2014-02-14 09:13 +1100
  Re: A curious bit of code... Ethan Furman <ethan@stoneleaf.us> - 2014-02-13 14:26 -0800
  Re: A curious bit of code... Terry Reedy <tjreedy@udel.edu> - 2014-02-13 19:29 -0500
  Re: A curious bit of code... forman.simon@gmail.com - 2014-02-13 18:45 -0800
    Re: A curious bit of code... Ned Batchelder <ned@nedbatchelder.com> - 2014-02-13 22:26 -0500
      Re: A curious bit of code... forman.simon@gmail.com - 2014-02-14 12:04 -0800
        Re: A curious bit of code... Mark Lawrence <breamoreboy@yahoo.co.uk> - 2014-02-14 21:01 +0000
  Re: A curious bit of code... Dave Angel <davea@davea.name> - 2014-02-14 07:19 -0500
    Re: A curious bit of code... Roy Smith <roy@panix.com> - 2014-02-14 09:06 -0500

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