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dacc/gist:404544

Created May 18, 2010 02:42
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gistfile1.txt
{dan@godel ~}$ irb
ruby-1.9.1-p378 > x = 0
=> 0
ruby-1.9.1-p378 > y = 3
=> 3
ruby-1.9.1-p378 > x = y
=> 3
ruby-1.9.1-p378 > y = 2
=> 2
ruby-1.9.1-p378 > x
=> 3
ruby-1.9.1-p378 > i = 0
=> 0
ruby-1.9.1-p378 > p = proc {
ruby-1.9.1-p378 > if not defined?(j)
ruby-1.9.1-p378 ?> j = i
ruby-1.9.1-p378 ?> end
ruby-1.9.1-p378 ?> j
ruby-1.9.1-p378 ?> }
=> #<Proc:0x00000100b40d58@(irb):7>
ruby-1.9.1-p378 > p.call
=> 0
ruby-1.9.1-p378 > i = 2
=> 2
ruby-1.9.1-p378 > p.call
=> 2
ruby-1.9.1-p378 >
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