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Full Discussion: Bash: How to get part of the directory name?
Top Forums Shell Programming and Scripting Bash: How to get part of the directory name? Post 302444721 by Aia on Thursday 12th of August 2010 03:23:28 PM
Old 08-12-2010
Quote:
Originally Posted by RickS
What are the @ characters for? Most of the sed commands I have seen have the format:
Code:
sed "s/old/new/g" *

I can't find a reference to the @ character in the context of a regular expression or as sed syntax.
The @ is not a character part of the regex. It is the boundary symbol Scottn choose to build the substitution for the sed utility.
Usually sed uses `/' with the `s' as in sed 's/old/new/' but when you need to use the `/' as part of the regex, it can become a mess to understand, so to make it a little easier, sed allows you to use any other symbol and as long you are consistent it works.
Code:
sed 's:old:new:'
sed 's!old!new!'
sed 's@old@new@'

All of them do the same.
Last edited by Scott; 08-12-2010 at 05:22 PM.. Reason: Added code tags
This User Gave Thanks to Aia For This Post:
RickS
 

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