In Ruby why won't `foo = true unless defined?(foo)` make the assignment?
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by LeftHem
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Published on 2010-02-18T19:39:57Z
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2010/05/27
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ruby
What's going on here? What is the subtle difference between the two forms of "unless"?
> irb(main):001:0> foo = true unless defined?(foo)
=> nil
irb(main):002:0> unless defined?(fooo) ; fooo = false ; end
=> false
thx
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