Re^2: arrays: shifting in while loop

... loop execution will continue regardless of the state of the array unless an explicit loop exit is made ...

Hmm, really? I always thought the while-loop EXPR was re-evaluated after each iteration:

my @a = (3, 4);

while (do { say "yo"; @a })
{
  say "hi mom";
  shift @a;  # no explicit loop break out
}

say "bye mom";

__END__
yo
hi mom
yo
hi mom
yo
bye mom
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Re^3: arrays: shifting in while loop by AnomalousMonk (Archbishop) on Mar 07, 2012 at 15:17 UTC
... the while-loop EXPR [is] re-evaluated after each iteration... It is, but I was trying to make a (perhaps rather trivial) point with regard to continued execution of the loop body (which I've tried to clarify in the original reply) as exemplified below. `>perl -wMstrict -le "my @ra = (9, 8, 7); ;; while (@ra) { print 0+@ra, ' in @ra'; shift @ra; print 0+@ra, ' in @ra'; shift @ra; print 0+@ra, ' in @ra'; shift @ra; print 0+@ra, ' in @ra'; shift @ra; print 0+@ra, ' in @ra'; shift @ra; print 0+@ra, ' in @ra'; } " 3 in @ra 2 in @ra 1 in @ra 0 in @ra 0 in @ra 0 in @ra` [download]	[reply] [d/l]
Re^4: arrays: shifting in while loop by repellent (Priest) on Mar 07, 2012 at 17:07 UTC
Great, I knew I missed something from your original post.	[reply]