Your code returns the following when run with warnings enabled: Use of uninitialized value in string eq at... Here's one way to do avoid the warning: 
while ((my $this = shift @sorted) and @sorted)
...

[download]
The warning occurs on the last iteration after you have shifted out the last element of @sorted.

--Dave

In reply to Re: Re: See if arrays match by redsquirrel
in thread See if arrays match by Anonymous Monk

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