From: Zach Dennis <zdennis@...>
Date: 2004-08-24T23:48:36+09:00
Subject: Re: *with* block?

Thanks everyone who replied....I like the instance_eval solution, 
although I think it would be nice if *with* were on a Object level, like 
Jamis Buck first posted...

class Object
    def with( obj , &block )
       obj.instance_eval &block
    end
end

class Test
   def initialize
       @x = 5
    end
    def x
       return x
    end
end

t = Test.new
with t do
    puts @x  
    x = 35
    @x = 35
end

puts t.x

I think the *with* block acts as expected as far as instance variables 
and local variables are conerned. When you initialize an object you have 
to specify the '@' or 'self.' before the variable name. So it makes 
sense that in the *block* it would be treated the same.

I think it is so much cleaner to say:

with obj do
    ...
end

rather then:

obj.instance_eval do

end

I guess there isn't a huge difference and I might just be being picky, 
but I totally think the *with* block is a much cleaner solution.

Zach