Quoting jzimmek <[email protected]>: > > some of my tests failed when comparing two floats. > > the comparison of: > > 1.1035 == 1.0035 + 0.1 > > evaluates to false - i do not really understand why. > > must depend on the value range, because > > 1.103 == 1.003 + 0.1 >
In general, exact comparisons of floating point numbers is a bad idea. A better idea is something along the lines of: (value1 - value2).abs <= epsilon epsilon may be a fixed value of a fraction of the values, maybe epsilon = (value1 + value2) / 100 i.e. 1/50 the average of the two. The best solution depends on the particular problem. Jeffrey --~--~---------~--~----~------------~-------~--~----~ You received this message because you are subscribed to the Google Groups "Ruby on Rails: Talk" group. To post to this group, send email to [email protected] To unsubscribe from this group, send email to [email protected] For more options, visit this group at http://groups.google.com/group/rubyonrails-talk?hl=en -~----------~----~----~----~------~----~------~--~---
