On 2005-10-22, William Park wrote:
> Chris F.A. Johnson <[EMAIL PROTECTED]> wrote:
>> On 2005-10-22, William Park wrote:
>> > [EMAIL PROTECTED] <[EMAIL PROTECTED]> wrote:
>> >> I am looking for the best and efficient way to replace the first word
>> >> in a str, like this:
>> >> "aa to become" -> "/aa/ to become"
>> >> I know I can use spilt and than join them
>> >> but I can also use regular expressions
>> >> and I sure there is a lot ways, but I need realy efficient one
>> >
>> > I doubt you'll find faster than Sed.
>>
>> On the contrary; to change a string, almost anything will be faster
>> than sed (except another external program).
>>
>> If you are in a POSIX shell, parameter expansion will be a lot
>> faster.
>>
>> In a python program, one of the solutions already posted will be
>> much faster.
>
> Care to put a wager on your claim?
In a shell, certainly.
If one of the python solutions is not faster than sed (e.g.,
os.system("sed .....")) I'll forget all about using python.
--
Chris F.A. Johnson <http://cfaj.freeshell.org>
==================================================================
Shell Scripting Recipes: A Problem-Solution Approach, 2005, Apress
<http://www.torfree.net/~chris/books/cfaj/ssr.html>
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