Difference between class_eval and just adding the function?

ruby-talk
1

Lets say I have

module A
class B
def t
puts "hi"
end
end
end

And I want to add a function to it. Whats the difference between:

module A
class B
def new_function
puts "foo"
end
end
end

***AND***

def new_function
puts "foo"
end
end

Is there any difference?

···

A::B.class_eval do
--
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2

Kind of hard to read all this nesting without some kind of spacing for
help. Or did it just get stripped for me, for some reason?

Anyway, I think, if you're writing out the method ahead of time,
there's not a real difference. However, if you wanted to create
methods on the fly based on something else (who knows what...), you'd
want, of the two, class_eval. Though, really, you'd probably want to
use add_method, or whatever the name of the function for doing that is
(can't remember right now).

Ben

···

On Feb 7, 2008 5:55 PM, Aryk Grosz <tennisbum2002@hotmail.com> wrote:

And I want to add a function to it. Whats the difference between:

module A
class B
def new_function
puts "foo"
end
end
end

***AND***

A::B.class_eval do
def new_function
puts "foo"
end
end

Is there any difference?