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Subject:	RE: OT: Using sed - guru help wanted.
Message-ID:	<OF38FCE2FD.7A284374-ONC1256DC6.00335ADD@icos.be>
From:	erik DOT cumps AT icos DOT be
Date:	Tue, 21 Oct 2003 11:36:01 +0200
MIME-Version:	1.0

Hi guys,

sorry if this thread was dead but couldn't resist.
Besides, it makes the start of my workday just that
more bearable... :) (regular expressions for fun and
profit eh)

Simply sed:

    sed 's#^ *\(.*[^ ]\) */ *\(.*[^ ]\) *$#.\1.\2.#'

Simply perl:

    perl -pe 's/^\s*(.*\S)\s*\/\s*(.*\S)\s*$/.$1.$2./'

Both will split at the slash and strip leading/trailing spaces
from the parts, even if a part contains just a single non-whitespace
character, even if there is no whitespace to remove.

Simple explanation:

at start of string;
        zero or more spaces;
        string of
                zero or more characters;
                non-space character;
        zero or more spaces;
        slash;
        zero or more spaces;
        string of
                zero or more characters;
                non-space character;
        zero or more spaces;
at end of string.

HTH,
Erik


As it seems my query wasn't that well formed...  i.e. remove any leading
and/or trailing spaces on the parts. Parts separated by the slash.
This seems to do exactly what I'm after;

$ echo 'a b/c d e  ' | \
  sed -re 's- *(.*[^ ]) */ *(.*[^ ]) *$-.\1.\2.-'

Thanks for the input, Brian and Igor.

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