Hello,
I'm interested in converting integers to a binary representation,
string. I.e. a desired function would produce:
dec2bin(13) => "1101"
The other way is easily done in Python with the int() function.
Perl has a very efficient way to do dec2bin, because its pack/unpack
have a B format for binary representations, so it's done with:
sub dec2bin {
my $str = unpack("B32", pack("N", shift));
$str =~ s/^0+(?=\d)//; # otherwise you'll get leading zeros
return $str;
}
Python's pack/unpack don't have the binary format for some reason, so
custom solutions have to be developed. One suggested in the ASPN
cookbook is:
http://aspn.activestate.com/ASPN/Cookbook/Python/Recipe/111286
However, it is very general and thus inefficient.
What would be the quickest way to do this ? I think that for dec2bin
conversion, using hex() and then looping with a hex->bin lookup table
would be probably much faster than the general baseconvert from the
recipe.
What do you think?
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