[Rails] Re: What does Rails do with basic Ruby's math behaviour?

Ruby on Rails Friday, December 7, 2012



On Thursday, December 6, 2012 8:41:20 AM UTC, Nicolas Desprès wrote:

Hi,

This is my first post on this mailing list and I would like to thanks the authors and the community for this great tools.

After a couple of weeks happily playing with Rails, I got bitten by a strange behaviour drift between Rails and Ruby:

Plain Ruby:

$ irb
irb(main):001:0> 2 / 5
=> 2/5
irb(main):003:0> 2.to_f / 5.to_f
=> 0.4


That's not how it behaves for me. I get 2 / 5 == 0 in both cases. The ruby mathn library (part of the stdlib) does do this (and I really wish it wouldn't). Perhaps something in your irbrc pulls this in ?

Fred

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Posted by Ruby on Rails at 3:46 AM

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