From: Brad Phelan <phelan@...>
Date: 2007-08-08T23:25:02+09:00
Subject: Re: case statement

Shai Rosenfeld wrote:
> Alex Young wrote:
>> Shai Rosenfeld wrote:
>>> end
>>>
>>> ((i.e, whatever value is included in the array))
>>> ...how do i do this?
>> Does the Array#include? method do what you need?  Perhaps a more
>> fleshed-out example might help?
> 
> Array#include is EXACTLY what i need, but syntaxtetically (if u get the 
> drift) i'm not sure how to do it:
> 
> case [3, 45, 6, 'abc'].inlcude?
> when 1: 'no good'
> when 3: 'good!'
> when 'lolo': 'no good'
> end
> 
> (the above doesn't work. it's gives a 'not enough arguments' error. how 
> do i do it correctly?)

Here's is a little trick that works

class Casey
     def initialize(o)
         @o = o
     end
     def method_missing(name)
         CaseyMethod.new(@o, name)
     end
end

class CaseyMethod
     def initialize(o, m)
         @o = o
         @m = m
     end
     def ==(other)
         @o.send(@m, other)
     end
end

class Object
     def casey
         Casey.new(self)
     end
end


case [2,3,4].casey.include?
when 1
     puts "a"
when 2
     puts "b"
else
     puts "c"
end

--
Brad Phelan
http://xtargets.com