From: David MacMahon <davidm@...>
Date: 2013-02-22T09:28:43+09:00
Subject: [ruby-core:52667] Re: [ruby-trunk - Bug #7829] Rounding error in Ruby Time


On Feb 20, 2013, at 11:17 AM, David MacMahon wrote:

> Interestingly, Ruby 1.9 has String#to_r which leads to this::
> 
>>> Time.utc(1970,1,1,0,0,12.86.to_s.to_r).strftime("%H:%M:%S,%L")
> => "00:00:12,860"

Even more interestingly, Ruby 1.9 also has Float#rationalize which leads to this:

irb(main):001:0> Time.utc(1970,1,1,0,0,12.86.rationalize).strftime("%H:%M:%S,%L")
=> "00:00:12,860"

What do people thing about changing num_exact() in time.c to call #rationalize for Floats rather than #to_r?  Or perhaps call #rationalize on the object if it responds to #rationalize so that this won't be exclusive to Floats?

Dave