Ruby can do several set operations on arrays : As Set « Array « Ruby

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Ruby » Array » As Set   Ruby can do several set operations on arrays # Intersection      & # Difference        - # Union             | # Intersection (&) creates a new array, merging the common elements of two arrays but removing uncommon elements and duplicates. tue = [ "shop", "eat", "sleep" ] wed = [ "shop", "eat", "read", "sleep" ] tue & wed # => ["shop", "eat", "sleep"]   Related examples in the same category 1.  Difference (-) creates a new array, removing elements that appear in both arrays 2.  Union (|) joins two arrays together, removing duplicates: 3.  Computing Set Operations on Arrays: Union 4.  Computing Set Operations on Arrays: Intersection 5.  Computing Set Operations on Arrays: Difference 6.  Set operation based on array 7.  TypeError: cannot convert Set into Array 8.  Set operation on array constant 9.  Minus from one array 10.  Exclude a list of natrual number

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