On Dec 8, 2010, at 10:37 , Hiro Asari wrote:

> irb(main):001:0> a=[]
> => []
> irb(main):002:0> a.instance_variable_set "@foo", "bar"
> => "bar"
> irb(main):003:0> a.reject {}.instance_variable_get "@foo"
> => "bar"
> irb(main):004:0> a.select {}.instance_variable_get "@foo"
> => nil

that's an _awesome_ find.