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instance method

Set#intersect?

intersect?(set)

# File tmp/rubies/ruby-3.2.0/lib/set.rb, line 480
def intersect?(set)
  case set
  when Set
    if size < set.size
      any? { |o| set.include?(o) }
    else
      set.any? { |o| include?(o) }
    end
  when Enumerable
    set.any? { |o| include?(o) }
  else
    raise ArgumentError, "value must be enumerable"
  end
end

Returns true if the set and the given enumerable have at least one element in common.

Example

Set[1, 2, 3].intersect? Set[4, 5]   #=> false
Set[1, 2, 3].intersect? Set[3, 4]   #=> true
Set[1, 2, 3].intersect? 4..5        #=> false
Set[1, 2, 3].intersect? [3, 4]      #=> true

See also #inspect #intersection #initialize_dup #join also in 4.1 · 4.0 · 3.4 · 3.3 · 3.1 · 3.0

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