From: Adam Gardner <adam.oddfellow@...>
Date: 2009-04-12T06:27:49+09:00
Subject: Re: a few thoughts for ruby...

Roger Pack wrote:
> Thought I'd pass these thoughts by the readers here before sending them
> to core.  They're my current wish list :)
> 
> 1) add an Object#in? method to complement the existing Array#include?
> 
> 2) add some useful lists of exceptions, ex: IO.SELECT_EXCEPTIONS,
> IO.READ_EXCEPTIONS, so that you can rescue the wide gamut of them
> appropriately, should you desire to.
> 
> 3) provide an easier way to know which platform you're on than
> RUBY_PLATFORM =~ /mswin32|dgjpp|mingw/
> 
> 4) (this one's controversial) remove the extra # for code in strings
> (i.e. "string#{code}") -> "string{code}" less typing.
> 
> 5) add a BigDecimal(float) method.
>  -> BigDecimal.new("%f" % float)
> 
> 6) add Dir.directory?
>  -> File.directory?
> 
> Feedback?
> Thanks!
> -=r

Object#in? can be very useful in keeping code legible; it more likely to 
be problematic in some circumstances than others. I'm using it in the 
game I'm writing right now and it's working just fine, but I don't 
really think it should be part of Ruby Core.

That said, it's very very easy to add yourself if you need it:

class Object
  def in?(object)
    if object.respond_to?(:include?) then
      object.include? self
    else
      false
    end
  end #def in?
end #class Object
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