On Thu, Apr 24, 2014 at 8:40 PM, Harry Putnam <rea...@newsguy.com> wrote:
> my $dir2sr = @{[shift]};
This shifts an element off @ARGV, makes an array reference containing
a single element (the value that was just shifted off), then
deferences that arrayref to create an array (which still contains a
single element, the value that was just shifted off), then assigns the
result of evaluating that array in a scalar context (which is the
number of elements in the array, i.e., 1) to $dir2sr.
(The same thing happens earlier, when you're pulling the first value
off @ARGV, but there the evaluation of the array is happening inside
qr//, which I guess imparts a list context so it DWyouM.)
In general, anywhere you're doing '@{[shift]}', unless you REALLY know
what's going on and why you'd want to do that ... instead just do
'shift'.
j.
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