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How to append to the file?

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# 1  
Old 06-12-2008
How to append to the file?
Hi
I have the file contents as below......

Code:
 MNG={{ABC|fdb|222}=12.0|1.3|1.5}
 MNG={{DEF|dfg|333}=11.0|0|0}
 MNG={{FGH|fcv|444}=4.0|7.0|1.5}


I need to search for the particular id '333' in the file and append to the end
of the particular row with the value 1.6.

Can any one help me to write the perl script for this query?
Last edited by Yogesh Sawant; 06-13-2008 at 05:47 AM.. Reason: added code tags
# 2  
Old 06-12-2008
I would not use Perl for this, but here goes.

Code:
perl -pe 's/(\|333\}.*)\}$/$1|1.6}/' file

Add the -i option if you want to change file directly. The above script simply prints the modified contents of file to standard output.
# 3  
Old 06-12-2008
for example
assuming your file in current dir is tmp and that you wanted to add the '1.6' inside curly brackets followed by '|':

sed -e 's/\(^MNG=.*\|.*\|333}\).*}$/\1\|1.6}/' ./tmp
MNG={{ABC|fdb|222}=12.0|1.3|1.5|1.6}
MNG={{DEF|dfg|333}=11.0|0|0|1.6}
MNG={{FGH|fcv|444}=4.0|7.0|1.5|1.6}
# 4  
Old 06-13-2008
Quote:
Originally Posted by ynir
assuming your file in current dir is tmp and that you wanted to add the '1.6' inside curly brackets followed by '|':

sed -e 's/\(^MNG=.*\|.*\|333}\).*}$/\1\|1.6}/' ./tmp
MNG={{ABC|fdb|222}=12.0|1.3|1.5|1.6}
MNG={{DEF|dfg|333}=11.0|0|0|1.6}
MNG={{FGH|fcv|444}=4.0|7.0|1.5|1.6}
When I use the above command in the perl script its giving the command Garbled error. How to debug this?
# 5  
Old 06-13-2008
It's not a Perl script, it's a sed script. But the Perl script I posted before does the same thing, albeit with a slightly different regular expression.
# 6  
Old 06-13-2008
Quote:
Originally Posted by era
I would not use Perl for this, but here goes.

Code:
perl -pe 's/(\|333\}.*)\}$/$1|1.6}/' file

Add the -i option if you want to change file directly. The above script simply prints the modified contents of file to standard output.
Can you plz help me to write this command in a perl script?
# 7  
Old 06-16-2008
Code:
#!/usr/bin/perl -p
s/(\|333\}.*)\}$/$1|1.6}/

Without more information about what you are trying to accomplish, it's hard to post any useful advice. If you are completely unfamiliar with Perl, why do you require the solution to be in Perl in the first place? If you have an existing Perl script which you want to modify, why don't you post (at least part of) the script here for us to see?
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