I know the uber Perlies will unravel this one without
breaking a sweat. Perhaps a the newer Perlites will take
a crack.

Why does this: 

my ($perms, $type) = @ARGV;
print "Other Test: ", ($perms & $type ) ,"\n";
print "Group Test: ", ($perms & ($type << 3 )),"\n";
print "Owner Test: ", ($perms & ($type << 4)),"\n";
# with command line params: 63,1;

[download]

Produce this:

Other Test: 0
Group Test: 8
Owner Test: 16

And this: 

my ($perms, $type) = @ARGV;
print "Other Test: ", ($perms & ($type << 0) ,"\n";
print "Group Test: ", ($perms & ($type << 3 )),"\n";
print "Owner Test: ", ($perms & ($type << 4)),"\n";
# with command line params: 63,1;

[download]

Produce this:

Other Test: 1
Group Test: 8
Owner Test: 16

Well snap my deerskin thong! I just figured her out,
but shoot I think I'll post her anyways.

mitd-Made in the Dark
I've always been astonished by the absurd turns
rivers have to make to flow under every bridge.

In reply to Bit Shifting ? by mitd

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