On Wed, Feb 17, 2010 at 12:00 AM, Dave @ UPENN <[email protected]> wrote:
>
> BUT when i was calling it in a rails activerecord, 'self' appears to
> be overwritten in the Dsl. so I had to reassign any of those methods
> to a variable..
Hi Dave,
there is no overwriting in the DSL.
Consider that piece of Ruby code :
---8<---
def generate
p [ :generate, self ]
R.pdef
end
module R
def self.pdef
p [ :pdef, self ]
end
end
generate
--->8---
It will return
---8<---
$ ruby t.rb
[:generate, main]
[:pdef, R]
--->8---
Or that one :
---8<---
def generate
p [ :generate, self ]
C.new.pdef
end
class C
def pdef
p [ :pdef, self ]
end
end
generate
--->8---
which gives :
---8<---
$ ruby t.rb
[:generate, main]
[:pdef, #<C:0x100156160>]
--->8---
See, no overwriting, just regular Ruby behaviour.
Now you may want to read about "closures" :
http://en.wikipedia.org/wiki/Closure_%28computer_science%29
Maybe this article about Ruby and closures might suit you :
http://martinfowler.com/bliki/Closure.html
Please read it carefully.
You are just dealing with a bit more advanced Ruby concepts. There is
no Rails or ruote interference with your code, no overwriting, no
magic.
Best regards,
--
John Mettraux - http://jmettraux.wordpress.com
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