[ruby-core:102829] [Ruby master Bug#17718] a method paramaters object that can be pattern matched against

Issue #17718 has been reported by dsisnero (Dominic Sisneros).

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Bug #17718: a method paramaters object that can be pattern matched against
https://bugs.ruby-lang.org/issues/17718

* Author: dsisnero (Dominic Sisneros)
* Status: Open
* Priority: Normal
* Backport: 2.5: UNKNOWN, 2.6: UNKNOWN, 2.7: UNKNOWN, 3.0: UNKNOWN
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def get_perdiem(city: nil, state: nil, zip:nil)

  case parameters_match  # (return an object of the parameters we can pattern match on)
  in {zip: zip}
     find_perdiem_by_zip(zip)
  in {state: s, city: c}
     find_perdiem_by_state_and_city(s, c)
  in { state: s}
     find_perdiem_by_state(s)
  else
     raise 'need combination of zip, city,state'
  end
end



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