Class: Set

Inherits:
Object show all
Defined in:
lib/aquarium/extensions/set.rb

Overview

Override #== to fix behavior where it seems to ignore overrides of Object#== or Object#eql? when comparing set elements. Note that we can’t put these definitions inside a helper module, as we do for other methods, and include in the reopened Hash class. If we do this, the method is not used!

Instance Method Summary collapse

Instance Method Details

#==(set) ⇒ Object Also known as: eql? 



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# File 'lib/aquarium/extensions/set.rb', line 7

def == set
  equal?(set) and return true
  set.is_a?(Set) && size == set.size or return false
  ary = to_a
  set.all? { |o| ary.include?(o) }
end

#intersection_using_eql_comparison(other) ⇒ Object

It seems that Set#& should work, but for some reason, it doesn’t.



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# File 'lib/aquarium/extensions/set.rb', line 24

def intersection_using_eql_comparison other
  first = dup
  second = other.dup
  first.size > second.size ? do_intersection(first, second) : do_intersection(second, first)
end

#union_using_eql_comparison(other) ⇒ Object

It seems that Set#| should work, but for some reason, it doesn’t.



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# File 'lib/aquarium/extensions/set.rb', line 17

def union_using_eql_comparison other
  first = dup
  second = other.dup
  first.size > second.size ? do_union(first, second) : do_union(second, first)
end