my $CurrentArrayRef = $Stacks{nonexistant} || [];

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Better yet: 

my $CurrentArrayRef = $Stacks{ nonexistant } ||= [];

[download]
This initializes $Stacks{ nonexistant } conditionally, and assigns its value to $CurrentArrayRef, thereby making this line: 
# Now (re)store the contents into the stack
$Stacks{nonexistant} = $CurrentArrayRef;

[download]
unnecessary.

the lowliest monk

In reply to Re^2: creating defined references to arrays of size zero by tlm
in thread creating defined references to arrays of size zero by spieper

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