I cant write 22 pipes like "\|.*\|.*".

Why not? ;-)

But try this: 

c:\@Work\Perl\monks>perl -wMstrict -le
"my $s = 'RcdA|CON|139|||Kan|13|J|J|607|abc@gmail.com';
 print qq{'$s'};
 ;;
 $s =~ s{ (?: [|] [^|]*){4} \z }{}xms;
 print qq{'$s'};
"
'RcdA|CON|139|||Kan|13|J|J|607|abc@gmail.com'
'RcdA|CON|139|||Kan|13'

[download]
I used your original example data and only removed four instances, not 22 (because there weren't that many), but you get the idea.

Give a man a fish:  <%-{-{-{-<

In reply to Re^5: how to remove a string from end of a line by AnomalousMonk
in thread how to remove a string from end of a line by rpinnam

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