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zachmargolis/arity.rb

Created March 6, 2013 15:05
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arity.rb
def x(a: 1, b: 2); end
def y(required, a: 1, b: 2); end
def z(optional = nil, a: 1, b: 2); end
method(:x).arity # => 0, no required args
method(:y).arity # => 1, 1 required arg
method(:z).arity # => -1, 0 required, 1 optional
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