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Re: $/ usage

by graff (Chancellor)
on Jan 02, 2013 at 21:41 UTC ( #1011357=note: print w/ replies, xml ) Need Help??

in reply to $/ usage

If you were expecting the $/="\n"; at the end of your one-liner to do something, that's your problem. That step doesn't do anything.

The undef $/; at the beginning does make sure that all the data in your list file gets slurped into $text, so when you do print $text; you should see the full content of the list, in its original form (as stored in the file).

Did you want to see something different from that?

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Re^2: $/ usage
by mimiandi (Novice) on Jan 02, 2013 at 21:54 UTC

    "in its original form" - i was expecting to see something like this: server1 ip server2 ip server3 ip etc..
    I was going to do another pattern match on the string $text after getting it in the string.

    perl -e 'undef $/; my $text=<>; 1 while $text =~ s/\b(\w+\d+)\s*\1\b/$ +1/gi; pring $text; $/="\n";' list
      To get all the lines from a slurped input file to show up as a single line on output, you want something like this:
      perl -e 'undef $/; $_=<>; tr/\n/ /; s/ $/\n/; print' list
      Or you could just use unix/linux commands that do the same thing:
      xargs echo -n < list
      (If you want a clean line break at the end of that output, add  && echo at the end.)

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