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taiki45/eval_binding.rb

Created October 31, 2012 13:17
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eval_binding.rb
def closure(x = 3)
Proc.new { x }
end
a = closure
a.call #=> 3
a.binding.eval "x" #=> 3
b = closure 5
eval "x", b.binding #=> 5
env = closure {|z| z + 3 }.binding
eval "yield x", env #=> 6
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