From: Brad Phelan <phelan@...>
Date: 2007-08-08T23:29:58+09:00
Subject: Re: case statement

Brad Phelan wrote:
> 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

The problem with the above is that I don't think it does what you want. 
It breaks out after it finds the first match and doesn't try to match
any further. If more than one *when* expression matches only the
first block is executed.

--
Brad Phelan
http://xtargets.com