What kind of data type can be rounded off?

Question

I am currently trying to round off a float number but i get an error message like: undefined method round_to for float 16.666667.. and my code for rounding off is

  option = [keys[count],    (((o.poll_votes.count.to_f)/@general_poll.poll_votes.count.to_f)*100).round_to(1)]

And what suprises me the most is that i have used this code at several places and is working just fine..but now is giving me errors.

thanks in advance.

Answer 1

the method round_to does not exist anywhere in ruby core. Most likely this functionality was included in a library you were using before but have not required it in your current project. After a quick search it looks like this functionality is included in the Ruby Facets library.

gem install facets

Check this article to add this functionality yourself: http://www.hans-eric.com/code-samples/ruby-floating-point-round-off/

FTA:

With a little monkey patching we can add custom round off methods to the Float class.

class Float
  def round_to(x)
    (self * 10**x).round.to_f / 10**x
  end

  def ceil_to(x)
    (self * 10**x).ceil.to_f / 10**x
  end

  def floor_to(x)
    (self * 10**x).floor.to_f / 10**x
  end
end

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