Andy Bastien wrote:
>
> There's a technique that I've been using for a while to set default
> values for variables, along the lines of:
>
> my $foobar = (shift or 42);
>
> I am correct in thinking that the '(shift or 42)' part creates an
> array slice with a single value, and that the assignment to $foobar
> converts that to a scalar? If so, is there a better way to do this
> that doesn't involve this conversion?
The parens in this case merely group the 'shift or 42'.
Other ways of writing the same:
# given...
@ARGV = (1 .. 3);
# equivalent
$foo[0] = (shift or 42);
$foo[1] = shift || 42;
$foo[2] = ($ARGV[0]) ? shift : 42;
# test
print map {"$_\n"} @foo;
Results:
1
2
3
HTH
--
I am following my fish.
-- Delirium, The Sandman
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