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perl negating Regular Expression

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# 8  
Old 03-10-2009
Could you verify the code you posted? I get a different output with your code:

Code:
% perl -pe 's#\&amp\;(\w\W*\w+\;)#\&$1#gm'<<<'<p>A policy insight into the R&amp;D patent relationshi&amp;ecute;p</p>'
<p>A policy insight into the R&amp;D patent relationshi&ecute;p</p>

# 9  
Old 03-10-2009
can you check with this

<p>A policy insight into the R&amp;D&amp;#x2013;patent relationship</p>
# 10  
Old 03-10-2009
... and the desired output should be?
# 11  
Old 03-11-2009
sorry for the late reply..


the desired output will be
<p>A policy insight into the R&amp;D&#x2013;patent relationship</p>
# 12  
Old 03-11-2009
If I'm not missing something:

Code:
% print '<p>A policy insight into the R&amp;D&amp;#x2013;patent relationship</p>' |
perl -pe's/&amp;(?!.*&)/&/' 
<p>A policy insight into the R&amp;D&#x2013;patent relationship</p>

You may need to include the g modifier.
# 13  
Old 03-11-2009
but the solution fails if the input is

<p>A policy insight into the&amp;#x2013; R&amp;Dpatent relationship</p>


the desired result is
<p>A policy insight into the&#x2013; R&amp;Dpatent relationship</p>
# 14  
Old 03-11-2009
i think i will make my requirement clear..

if &amp;xxxxxx; is present in the string then it should replace the &amp; with &

but if the xxxxxx (which can be longer) contains a &. then it should not replace it.
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