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Re^4: skipping the first line of a file

by ikegami (Patriarch)
on Jun 13, 2009 at 20:11 UTC ( #771287=note: print w/replies, xml ) Need Help??

in reply to Re^3: skipping the first line of a file
in thread skipping the first line of a file

Because the docs says it isn't.

The behaviour of a my statement modified with a statement modifier conditional or loop construct (e.g. my $x if ... ) is undefined. The value of the my variable may be undef, any previously assigned value, or possibly anything else. Don't rely on it. Future versions of perl might do something different from the version of perl you try it out on. Here be dragons.

( EmphasisStrong emphasis in original. )

That said, the current behaviour is actually quite predictable, and it doesn't limit $discard to the loop

>perl -cwe"use strict; my $x for 1..2; print $x" -e syntax OK

So not only is not valid Perl, it doesn't even work.

Replies are listed 'Best First'.
Re^5: skipping the first line of a file
by johngg (Canon) on Jun 13, 2009 at 22:28 UTC

    You learn something new every day. I'll remember not to do that in future but use a real loop instead.

    Thank you,


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