Rails - Nov 2007 - Anything wrong with this? am I just making trouble?

I have included this extension to Hash in my rails app...

class Hash
  def method_missing(name, value=nil)
    key = name.to_s.sub(/[=?!]$/,'''').to_sym
    self[key] = value if name.to_s[-1,1] == "="
    return self[key]
  end
end

I basically lets a plane old Hash behave like the fancy OpenStruct, so
you can do things like hash.amount = 10 instead of hash[:amount] 10.  It uses
method_missing to do its stuff.
>> h = Hash.new
=> {}
>> h.a = 1
=> 1
>> h.b = 2
=> 2
>> h.c = 3
=> 3
>> pp h
{:a=>1, :b=>2, :c=>3}
=> nil
>> h.h = Hash.new
=> {}
>> h.h.a = 1
=> 1
>> h.h.b = 2
=> 2
>> h.h.c = 3
=> 3
>> pp h
{:a=>1, :b=>2, :c=>3, :h=>{:a=>1, :b=>2, :c=>3}}
=> nil

--~--~---------~--~----~------------~-------~--~----~
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
rubyonrails-talk-/JYPxA39Uh5TLH3MbocFFw@public.gmane.org
To unsubscribe from this group, send email to
rubyonrails-talk-unsubscribe-/JYPxA39Uh5TLH3MbocFFw@public.gmane.org
For more options, visit this group at
http://groups.google.com/group/rubyonrails-talk?hl=en
-~----------~----~----~----~------~----~------~--~---

On 28 Nov 2007, at 16:47, uncle wrote:
>
> I have included this extension to Hash in my rails app...
>
> class Hash
>  def method_missing(name, value=nil)
>    key = name.to_s.sub(/[=?!]$/,'''').to_sym
>    self[key] = value if name.to_s[-1,1] == "="
>    return self[key]
>  end
> end
>
> I basically lets a plane old Hash behave like the fancy OpenStruct, so
> you can do things like hash.amount = 10 instead of hash[:amount] > 10. 
It uses method_missing to do its stuff.
I suppose the danger is that the day you do hash.delete_if! instead of  
getting a no method error it will just work and lead to a less easy to  
understand error further down the road.

Fred
>
>
>>> h = Hash.new
> => {}
>>> h.a = 1
> => 1
>>> h.b = 2
> => 2
>>> h.c = 3
> => 3
>>> pp h
> {:a=>1, :b=>2, :c=>3}
> => nil
>>> h.h = Hash.new
> => {}
>>> h.h.a = 1
> => 1
>>> h.h.b = 2
> => 2
>>> h.h.c = 3
> => 3
>>> pp h
> {:a=>1, :b=>2, :c=>3, :h=>{:a=>1, :b=>2, :c=>3}}
> => nil
>
> >

--~--~---------~--~----~------------~-------~--~----~
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
rubyonrails-talk-/JYPxA39Uh5TLH3MbocFFw@public.gmane.org
To unsubscribe from this group, send email to
rubyonrails-talk-unsubscribe-/JYPxA39Uh5TLH3MbocFFw@public.gmane.org
For more options, visit this group at
http://groups.google.com/group/rubyonrails-talk?hl=en
-~----------~----~----~----~------~----~------~--~---