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Perl help for file handling


 
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# 1  
Old 06-21-2011
Perl help for file handling

$# some text
$$ some text
$@ some text
$$. some text

Mg1 some text
Mg2 some text
.
.
.
Mg10 some text

The above 10 lines are to be extracted except the lines starting from $#,$$.,...

Last edited by baig.abdul; 06-21-2011 at 04:46 AM..
# 2  
Old 06-21-2011
DELETED

Last edited by yazu; 06-21-2011 at 08:36 AM.. Reason: OP changed question
# 3  
Old 06-21-2011
can some 1 explain the above line
# 4  
Old 06-21-2011
Bug

Quote:
Originally Posted by yazu
With gnu sed:
Code:
% cat testfile | perl -lane '/^Mg/ && print $F[0]' | sed 'N; s/\n/ /'

cat + perl + sed = WOW !!!

---------- Post updated at 02:06 PM ---------- Previous update was at 02:00 PM ----------

Quote:
Originally Posted by baig.abdul
$# some text
$$ some text
$@ some text
$$. some text

Mg1 some text
Mg2 some text
.
.
.
Mg10 some text

The above 10 lines are to be extracted except the lines starting from $#,$$.,...
Code:
perl -wln -e 'print if (!/^\$/ and /^MG/)' FILE.txt

With perl coming into picture, sed/grep/awk should make way for it.

Thanks and Regards,
Gaurav.
# 5  
Old 06-21-2011
what about the grep command ?

Code:
 
grep "^Mg" filename

Code:
grep -v "^\$" filename

I didnt notice the post says "Perl help for file handling"

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