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[QUOTE="Eric D., post: 4503428"]
Hello,

I've some difficolties with instance variables and classe variables

With :

class A
def foo
@foo
end
def bar
@@bar
end
end

a = A.new

---------                  ------------                  ------------
|       |                  |          |                  |          |
|  a    |--(instance_of)->-|    A     |--(instance_of)->-|  Class   |
|       |                  |          |                  |          |
---------                  ------------                  ------------

a is an instance of A which itself is an instance of Class
@foo is an instance variable, so it is stored in box "a"
@@bar is a class variable, so it is stored in box "A"

if I do something like the following :

class A
def A.strange
@strange
end
end

Where is stored my @strange ? I had the hypothesis that @strange in the
"A" context was equivalent to @@strange in the "a" context but the
following code prove me to be wrong :

class A
def A.strange
@strange
end
def strange=( val )
@@strange = val
end
end

a = A.new
a.strange= 2
p A.strange # output is nil, not 2

Could someone explain me where to place this @strange ? in which box
could I store it ?

Thanks in advance
[/QUOTE]

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