[ushi]

Ruby defines division by zero for Floats

  1.0 / 0
  => Float::INFINITY

and

  0 * Float::INFINITY
  => Float::NAN

I think infinity is a more intuitive result, but most of the time i get this as a user i would rather see 0 (bought books per month: Infinity). As a programmer i like to get an error, because i forgot to handle an edge case...

[scarejunba]

That's IEEE 754 https://en.wikipedia.org/wiki/IEEE_754#Exception_handling

[nostalgeek]

AFAIK Javascript does this as well.