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# 22  
Old 08-31-2008
yes i mean it will not it, if it is already exist.

one more thing pls, how to remove duplicate lines from file, if more than occurance.

kindly advice.

Thanks,
Bash
# 23  
Old 08-31-2008
If you are attempting to maintain a hosts file or some such, perhaps it would be easier if you had a template and only add to the template, overwriting whatever was there before. (Perhaps this is not doable in your scenario, but if you can do it, it could simplify things a great deal.)

Code:
perl -i~ -nle ' BEGIN { %seen = ('tito-k.abcd.com' => 1, 'reta-k.abcd.com' => 1); }
print unless $seen{$_}++;
END { print "pppp.abcd.com" unless $seen{"pppp.abcd.com"}' file

Last edited by era; 08-31-2008 at 05:59 AM.. Reason: Oops, use postincrement; mistyped reta-k.abcd.com
# 24  
Old 09-01-2008
Code:
perl -i~ -nle ' BEGIN { %seen = ('tito-k.abcd.com' => 1, 'reta-k.abcd.com' => 1); }
print unless $seen{$_}++;
END { print "pppp.abcd.com" unless $seen{"pppp.abcd.com"}' file

[/QUOTE]


Hi,

Its giving error.

String found where operator expected at code line 1, near "nle ' BEGIN { %seen = ('"
(Do you need to predeclare nle?)
Bareword found where operator expected at code line 1, near "' BEGIN { %seen =

pls suggest.

Thanks,
Bash
# 25  
Old 09-01-2008
Are you sure you copied era's code correctly? It sounds like you have somehow ended up with 'nle' inside the script part, instead of as a command-line option, which is what it should be.
# 26  
Old 09-01-2008
Hi Greetings,

I use Era code as he describe, but i am sure a little thing might be missing.

pls advice Era.

Thanks,
Bash
# 27  
Old 09-02-2008
Try this:

Code:
perl  -nle '
    BEGIN { %seen = ("tito-k.abcd.com" => 1, "reta-k.abcd.com" => 1); }
    print unless $seen{$_}++;
    END { print "pppp.abcd.com" unless $seen{"pppp.abcd.com"} }
' file

# 28  
Old 09-02-2008
Yes, sorry for mixing in single quotes; dunno why I would have done that.

The error message indicates you are somehow passing in nle as part of the script. It's not, it's an option.
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