Method: Enumerable#aT_subset_of

Defined in:
lib/y_support/typing/enumerable/typing.rb

#aT_subset_of(other_collection, what_is_receiver_collection = nil, what_is_other_collection = nil) ⇒ Object

Fails with TypeError unless all the collection members are included int the collection supplied as argument. Second optional argument (collection element description) customizes the error message.

Raises:

  • (TErr) 


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# File 'lib/y_support/typing/enumerable/typing.rb', line 65

def aT_subset_of other_collection, what_is_receiver_collection=nil,
                 what_is_other_collection=nil
  rc = what_is_receiver_collection ?
    what_is_receiver_collection.to_s.capitalize : "collection"
  oc = what_is_other_collection ? what_is_other_collection.to_s.capitalize :
    "the specified collection"
  m = "The #{rc} must be a subset of #{oc}"
  raise TErr, m unless all? { |e| other_collection.include? e }
  return self
end