Re: String manipulation in python..NEED HELP!!!!

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From	Terry Reedy <tjreedy@udel.edu>
Subject	Re: String manipulation in python..NEED HELP!!!!
Date	Tue, 11 Dec 2012 14:30:23 -0500
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Show key headers only | View raw

On 12/10/2012 5:59 PM, John Gordon wrote:

> def encode(plain):
>     '''Return a substituted version of the plain text.'''
>     encoded = ''
>     for ch in plain:
>        encoded += key[alpha.index(ch)]
>     return encoded

The turns an O(n) problem into a slow O(n*n) solution. Much better to 
build a list of chars and then join them.

-- 
Terry Jan Reedy

Thread

String manipulation in python..NEED HELP!!!! qbailey@ihets.org - 2012-12-10 14:38 -0800
  Re: String manipulation in python..NEED HELP!!!! John Gordon <gordon@panix.com> - 2012-12-10 22:59 +0000
    Re: String manipulation in python..NEED HELP!!!! Terry Reedy <tjreedy@udel.edu> - 2012-12-11 14:30 -0500
      Re: String manipulation in python..NEED HELP!!!! Ross Ridge <rridge@csclub.uwaterloo.ca> - 2012-12-11 15:52 -0500
        Re: String manipulation in python..NEED HELP!!!! Tim Delaney <timothy.c.delaney@gmail.com> - 2012-12-12 08:34 +1100
  Re: String manipulation in python..NEED HELP!!!! Vlastimil Brom <vlastimil.brom@gmail.com> - 2012-12-11 00:25 +0100
  Re: String manipulation in python..NEED HELP!!!! Chris Angelico <rosuav@gmail.com> - 2012-12-11 10:36 +1100
  Re: String manipulation in python..NEED HELP!!!! duncan smith <buzzard@invalid.invalid> - 2012-12-11 16:39 +0000
    Re: String manipulation in python..NEED HELP!!!! Peter Pearson <ppearson@nowhere.invalid> - 2012-12-11 22:21 +0000

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