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How to remove all text except pattern

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# 1  
Old 01-04-2010
Data How to remove all text except pattern
i have nasty html file with 2000+ simbols in 1 row...i need to remove whole the code except title="Some title..." and store those into file with titles (the whole text is in variable text)
i've tried something like this:


Code:
echo $text | sed 's/.*\(title=\".+\"\).*/\1/' > titles.html

BUT it does not work, script run fine, but nothing happened...file "titles.html" look just like text variable

can you help me someone please?SmilieSmilieSmilie
Last edited by Lukasito; 01-04-2010 at 05:45 PM.. Reason: little error
# 2  
Old 01-04-2010
Try:

Code:
echo "$text" | sed 's/^.*\(title="[^"]*"\).*$/\1/' > titles.html

In sed's default basic regular expression grammar, + is not special; it is a literal plus sign.

Also, the quotes around $text that i added preserve any runs of IFS characters (most likely spaces, if any) that may occur in the title.

Regards,
alister
Last edited by alister; 01-04-2010 at 06:02 PM.. Reason: added code tags
# 3  
Old 01-04-2010
Tools Is this what you are looking for?
Code:
>echo "title=123abc and more ^&@%#$%&@"
"title=123abc and more ^&@%#$%&@"

>echo "title=123abc and more ^&@%#$%&@" | tr -cd [:alpha:][:space:][:digit:]
title123abc and more

# 4  
Old 01-04-2010
Data
still everything in the output file SmilieSmilie
# 5  
Old 01-04-2010
Code:
echo "$text" | sed -ne '/^.*\(title="[^"]*"\).*$/s//\1/p' > titles.html

If that doesn't work, then provide some sample data and desired output.
# 6  
Old 01-04-2010
Can you post the output of the following command over here ?

Code:
echo $text

tyler_durden

Also, are the "2000+ symbols" -
(a) special, but printable, characters like "@", "$", "%" etc. or
(b) non-printable characters like those for ASCII 0, 1, 2, etc.
# 7  
Old 01-04-2010
Code:
echo $text| grep -o "title=\".*\""
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