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JEG2/surprise.rb

Created February 19, 2015 15:28
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Is this a bug in Ruby or just a poor method definition on my part?
Raw
surprise.rb
class HashLike
def to_hash
{a: 1, b: 2}
end
end
def surprise(*args, keyword: nil)
p args
end
surprise(HashLike.new)
# ~> -:11:in `<main>': unknown keywords: a, b (ArgumentError)
@nathanl
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nathanl commented Feb 19, 2015

I'm even surprised at a simpler case; the fact that it calls to_hash at all.

class HashLike
  def to_hash
    {a: 1, b: 2}
  end
end
def return_keywords(one: 1, two: 2)
  [one, two]
end
return_keywords(HashLike.new)
# ~> ArgumentError: unknown keywords: a, b

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