You have interspersed your code with prose making it more difficult to download and analyse. Do not do that. Wrap your prose in <p> tags and your data and code in <code> tags instead, please.

Here is a one-liner which does what you want. Add -i to edit in-place (see perlrun)

perl -lpe '$s{$_}++; s/;$/_$s{$_};/' foo.txt

[download]

🦛

In reply to Re: To remove duplicate lines and add digits as per loop by hippo
in thread To remove duplicate lines and add digits as per loop by suvendra123

Title:
Use:  <p> text here (a paragraph) </p>
and:  <code> code here </code>
to format your post, it's "PerlMonks-approved HTML":


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