On Sun, 20 Jun 2004 15:57:48 +0100, Jonathan Worthington
[EMAIL PROTECTED] wrote:
Alexey Trofimenko [EMAIL PROTECTED] wrote:
what do you think about adding Cdiv operator, akin %, to perl6 core?
I mean, as$a % $b
really does int($a) % int($b)
and returns modulous,
so $a div $b
really does int( int($a) / int($b) )
and returns integer division.
but with native integers, declared as such, and with constants it
should
be optimized and done really fast
yes, I realize that it wouldn't speed Perl up much, but I like idea that
such a simple operation can be done using one simple machine
instruction.
And I use such a function often, but I hate that it uses floats
internally.
I'd imagine that if you declare a variable as an int, the compiler would
be
able to generate optimal code for the % operator anyway, so you'd get the
speed you wanted.
Jonathan
of course! but what I'm talking about is integer / , (not %, which we
have already). I talked about division, which takes integer args and
return _integer_ result. Sometimes you need exactly this, and Perl would
never guess it, even if both args of / are integer, but what if we're
expect fraction results? So now perl always calcs float division..
One example -
$t = time - $when_it_happen;
$sec=$t%60; $t=int($t/60);
$min=$t%60; $t=int($t/60);
$hours=$t%24; $t=int($t/24);
$days=$t;
return time_elapsed($days,$hours,$min,$sec)
