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egrep vs. sed backreference

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# 1  
Old 02-13-2006
egrep vs. sed backreference
My egrep outputs this:

Code:
[r0sc0@dev]$ cat html.out|sed -n '/bluetext/s/ / /gp'|egrep '[0-9]{5}'
<span class="bluetext"><b>  Lexington Park, MD 20653</b></span>


But my backreference \1 is empty. I dont understand why. Can someone clarify?

Code:
[r0sc0@dev]$ cat html.out|sed -n '/bluetext/s/&nbsp;/ /gp'|sed -n 's/.*\([0-9]{5}\).*/\1/p'

# 2  
Old 02-14-2006
got it:

Code:
cat html.out |sed -n '/bluetext/s/&nbsp;/ /gp'|sed -n -e 's/.*\([0-9]\{5\}\)<\/b>.*/\1/p'
20653

Yay.
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