Re2: Nibble swap

by blakem (Monsignor)

on Oct 04, 2002 at 20:45 UTC ( [id://202891]=note: print w/replies, xml )

Need Help??

That would be great if << and >> worked on bits, but I don't think they do.

% perl -le 'print "5" << 4'
80
[download]

i.e. 5*2^4 == 80

-Blake

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Re^3: Nibble swap by Aristotle (Chancellor) on Oct 04, 2002 at 20:53 UTC
Doh, you're right. But `$ perl -le 'print ord("5") << 4' 848` [download] Though I'm not sure we can just say `my $swapped = (ord($_) << 4 \| ord($_) >> 4) & 0xFF;` to fix it. (Don't seem to be able to wrap my head around it right now.) Makeshifts last the longest.	[reply] [d/l] [select]

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