From: "Mike T. Miller" <mtm@...>
Date: 2001-05-08T03:07:37+09:00
Subject: [ruby-talk:14792] Integer division oddness

My father pointed out this oddity.

Using integer math, try this on various languages:

-10 / 9

For ruby, python and tcl you get: -2!
For java, c and gforth you get:   -1

Getting -2 seems really wrong to me.  I looked at the
code for ruby and found this: (numeric.c: line 1056)

    if ((mod < 0 && y > 0) || (mod > 0 && y < 0)) {
        mod += y;
        div -= 1;
    }

So, bascially, one is subtracted on purpose in this case.
Is this an accepted way to do integer division tha I'm not
familiar with?

thanks,
Mike