On Aug 22, 2005, at 6:47 AM, Alexander Kellett wrote:
yup. though don't be caught by this:
irb(main):003:0> B=Struct.new :g
=> B
irb(main):004:0> class B; def blah; p @g; end; end
=> nil
irb(main):005:0> B.new(5).blah
nil
=> nil
Yeah, as I was writing up my suggested example for the docs, I
noticed that the properties weren't available as instance variables,
and I needed to use the accessor methods instead to read the values.
Indeed, it looks like instances of the Struct somehow magically store
their internal state in the ether:
irb(main):001:0> Klass = Struct.new( :foo, :bar )
=> Klass
irb(main):002:0> instance = Klass.new( 'f', 'b' )
=> #<struct Klass foo="f", bar="b">
irb(main):003:0> instance.instance_variables
=> []
Is this is a case where some internal details are being magically
hidden by the C side? Or is it possible in Ruby to have an instance
variable that doesn't show up in #instance_variables?
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