The intersection is the set of values that appear in both : Set « Collections « Ruby






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  3. Set

The intersection is the set of values that appear in both


require 'set'

primes = Set[2, 3, 5, 7]
odds = Set[1, 3, 5, 7, 9]

p primes & odds             # => #<Set: {5, 7, 3}>
p primes.intersection(odds) # this is an explicitly named alias








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