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pocke/return_if.rb

Created February 13, 2017 12:15
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return_if.rb
class Binding
def return_if(name)
eval "return #{name}" if local_variable_get(name)
end
end
def foo(v)
binding.return_if(:v)
'v is nil'
end
puts foo(10) # => 10
puts foo(nil) # => 'v is nil'
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