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It might have been in old versions of Perl, but not any more:
print "<\v>";

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Gives:
Unrecognized escape \v passed through at C:\gash.pl line 6.
<v>

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perl 5.12.0

Update: I rather like this: http://prog21.dadgum.com/76.html

Interestingly it is still mentioned in the 5.12.2 version of perlre.

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Re^2: vertcal tab
by davido (Cardinal) on Feb 03, 2011 at 09:29 UTC

    perlre seems to be suggesting that regular expressions will recognize \v as vertical whitespace, in text that's being matched. But '\v' as a pattern is not the same as '\v' as a string escape sequence.


    Dave

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