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Re: python string, best way to concat

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On 28/08/2014 13:08, Roy Smith wrote:
> In article <63bdccb4-9e34-4e40-b07d-14342e21815f@googlegroups.com>,
>   peter <peter.mosley@talk21.com> wrote:
>
>> I used to struggle with the concept of ''.join(('hello ','world')) - it
>> seemed so convoluted compared with the intuitive 'hello '+'world', and I
>> could never remember the syntax.  Also, for the strings I was generally using
>> the performance penalty was infinitesimal, so I was just adding complexity
>> for the sake of the abstract concept of a more 'pythonic' style.
>>
>> Obviously this isn't going to change, but for concatenating short strings a
>> and b is there any practical reason to avoid a+b?
>
> For places where performance doesn't matter, string addition is just
> fine.  The computer works for you.  If you're working for the computer,
> you're doing something wrong.
>
> That being said, join is typically used where you have a variable number
> of strings in some iterable (e.g. a list of strings).  For exactly two
> strings, I would have probably written this as:
>
> '%s %s' % (string1, string2)
>
> and if I really wanted to use the join syntax, I would have moved the
> delimiter (in this case, a space), into the first string:
>
> ' '.join([string1, string2])
>
> Be aware of the various ways, then pick the one that works for you.
>

Which reminds me of 
http://code.activestate.com/recipes/577845-format_iter-easy-formatting-of-arbitrary-iterables/

-- 
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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python string, best way to concat dennisearlevans@gmail.com - 2014-08-27 13:31 -0700
  Re: python string, best way to concat Dan Stromberg <drsalists@gmail.com> - 2014-08-27 15:30 -0700
  Re: python string, best way to concat Peter Otten <__peter__@web.de> - 2014-08-28 00:34 +0200
  Re: python string, best way to concat MRAB <python@mrabarnett.plus.com> - 2014-08-27 23:42 +0100
  Re: python string, best way to concat Tim Chase <python.list@tim.thechases.com> - 2014-08-27 17:44 -0500
  Re: python string, best way to concat Chris Angelico <rosuav@gmail.com> - 2014-08-28 08:55 +1000
  Re: python string, best way to concat Peter Otten <__peter__@web.de> - 2014-08-28 00:59 +0200
  Re: python string, best way to concat MRAB <python@mrabarnett.plus.com> - 2014-08-28 08:12 +0100
  Re: python string, best way to concat peter <peter.mosley@talk21.com> - 2014-08-28 01:30 -0700
    Re: python string, best way to concat Marko Rauhamaa <marko@pacujo.net> - 2014-08-28 11:34 +0300
    Re: python string, best way to concat Mark Lawrence <breamoreboy@yahoo.co.uk> - 2014-08-28 09:43 +0100
    Re: python string, best way to concat Chris Angelico <rosuav@gmail.com> - 2014-08-28 18:58 +1000
    Re: python string, best way to concat Roy Smith <roy@panix.com> - 2014-08-28 08:08 -0400
      Re: python string, best way to concat Mihamina Rakotomandimby <mihamina.rakotomandimby@rktmb.org> - 2014-08-28 15:19 +0300
      Re: python string, best way to concat Mark Lawrence <breamoreboy@yahoo.co.uk> - 2014-08-28 15:48 +0100

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