[ruby-core:23221] Re: [Bug #1336] Change in string representation of Floats

Gary Wright:

> IEEE also defines negative 0.0, which
> has interesting behavior in Ruby  (1.8):

> >> z = 0.0
> >> nz = -0.0
> >> p z
> 0.0
> => nil
> >> p nz
> -0.0
> => nil
> >> z == nz
> => true
> >> z.eql? nz
> => true

> I would have thought that z.eql?(nz) might be false. There doesn't 
> seem to be a way to query a float to distinguish between -Infinity
> and Infinity

These actually aren’t ==, eql? nor equal?

> or between -0.0 and 0.0 other than via #to_s.

-0.0.equal? 0.0 # => false

— Shot
-- 
Nobody came to my trombone recital. I wish there was some
way to express how I feel right now. [Joshua Green Allen]