Re^4: Shared variable not changing?

I'm not sure that's the problem, but if it is, how do I write $#queue+1 and $#{$queue[0]}+1 with array refs instead? I want to check if the queue is empty and the length of it.

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Re^5: Shared variable not changing? by almut (Canon) on Mar 17, 2009 at 11:16 UTC
how do I write `$#queue+1` and `$#{$queue[0]}+1` with array refs instead? `$#$queue+1 $#{$queue->[0]}+1` [download] or simply `scalar @$queue # number of elements scalar @{$queue->[0]}` [download] (you don't need the `scalar` if it's in scalar context anyway, like with `if (@$queue)` ) Presuming the first element of the referenced array holds another array ref, that is (not sure what you intend to keep there...).	[reply] [d/l] [select]

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Re^5: Shared variable not changing?
by almut (Canon) on Mar 17, 2009 at 11:16 UTC

how do I write $#queue+1 and $#{$queue[0]}+1 with array refs instead?

$#$queue+1
$#{$queue->[0]}+1
[download]

or simply

scalar @$queue          # number of elements
scalar @{$queue->[0]}
[download]

(you don't need the scalar if it's in scalar context anyway, like with if (@$queue) )

Presuming the first element of the referenced array holds another array ref, that is (not sure what you intend to keep there...).

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