From: Phrogz <phrogz@...>
Date: 2010-01-02T13:35:06+09:00
Subject: Re: Rounding float in ruby via .round

On Jan 1, 7:22 pm, pharrington <xenogene...@gmail.com> wrote:
> On Jan 1, 9:13 pm, Phillip Gawlowski <p...@thimian.com> wrote:
>
> > Which Ruby are you on?
>
> <= 1.8.7

You could do (untested on 1.8):

if Float.instance_method(:round).arity == 0
  class Float
    alias_method :_orig_round, :round
    def round( decimals=0 )
      factor = 10**decimals
      (self*factor)._orig_round / factor
    end
  end
end

Even gives you rounding to 'negative' decimal places, as in 1.9