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$num = int $num;
$num = (~abs($num))+1 if $num < 0;

You can get the same effect with $num |= 0; ...but... why? Why would you want two's complement behavior in other bases?

Truncating at $n bits is mathematically equivalent to:

$num %= 2 ** $n;

That's only meaningful for base-2. You can truncate at $n base-$b digits using this:

$num %= $b ** $n;

So -1 becomes 999999 in base-10 or 666666 in base-7. If you want, you can pick a big number of digits that still fits in a double-precision float like this:

$num %= $base ** int(36.73/log($base));

In reply to Re^3: Math::Base - arithmetics with baseX integers (OP updated) by no_slogan
in thread Math::Base - arithmetics with baseX integers (updated) by shmem

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