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Searching for a pattern

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# 8  
Old 05-24-2010
in all seriousness...as I'm sure radoulov's response was as well:
Code:
-> print "line1 000\nline2 001\nline3 N/A\nline4 003\nline4 N/A\n" |awk '/N\/A/ {print $0;} '
line3 N/A
line4 N/A

-> print "line1 000\nline2 001\nline3 N/A\nline4 003\nline4 N/A\n" |awk '! /N\/A/ {print $0;} '
line1 000
line2 001
line4 003

# 9  
Old 05-24-2010
Quote:
Originally Posted by curleb
in all seriousness...as I'm sure radoulov's response was as well:
Code:
-> print "line1 000\nline2 001\nline3 N/A\nline4 003\nline4 N/A\n" |awk '/N\/A/ {print $0;} '
line3 N/A
line4 N/A

-> print "line1 000\nline2 001\nline3 N/A\nline4 003\nline4 N/A\n" |awk '! /N\/A/ {print $0;} '
line1 000
line2 001
line4 003

Correct,
the dynamic regular expression that I used would be slower.


P.S. I'm quite sure the OP was commenting bankimmehta's post that I deleted.
# 10  
Old 05-24-2010
In fact, using something even closer to radoulov's example:
Code:
-> print "line1 000\nline2 001\nline3 N/A\nN/A   003\nline4 N/A\n"                                             
line1 000
line2 001
line3 N/A
N/A   003
line4 N/A

-> print "line1 000\nline2 001\nline3 N/A\nN/A   003\nline4 N/A\n" |nawk '{ if ( $2 == "N\/A" ) {print $0;} } '
line3 N/A
line4 N/A

-> print "line1 000\nline2 001\nline3 N/A\nN/A   003\nline4 N/A\n" |nawk '{ if ( $1 == "N\/A" ) {print $0;} } '
N/A   003

-> print "line1 000\nline2 001\nline3 N/A\nN/A   003\nline4 N/A\n" |nawk '{ if ( $2 == "N/A" ) {print $0;} } ' 
line3 N/A
line4 N/A

# 11  
Old 07-23-2010
what would be the regular expression that can search for a pattern. Pattern is having 8 characters out of which atleast one digit, one lower case, one upper case letter and one special character will be there. But these can occur at any place randomly. Please help me out.
I'm using find $dir -name "test_file.txt" -exec egrep -ni "[a-z]+[A-Z]+[0-9]+['\~', '\!', '\$', '\%', '\^', '\&', '\-', '\=',' \.', '\:', '\;']" {} \; -print

But this will work only for pattern that begins with lower then upper then digit and then special characters. What if they can happen at any random place... Smilie
Thanks in advance...
# 12  
Old 07-23-2010
follow this..

Code:
$ awk -F, '{ if($n=="N/A") print $0 }' <filename>

specify the delimiter, comma in this case i have considered ...Instead of $n specify the column you want to search for
Last edited by radoulov; 07-23-2010 at 04:35 PM.. Reason: Code tags, please!
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