Ruby Language Arrays Arrays union, intersection and difference
Example
x = [5, 5, 1, 3]
y = [5, 2, 4, 3]
Union (|) contains elements from both arrays, with duplicates removed:
x | y
=> [5, 1, 3, 2, 4]
Intersection (&) contains elements which are present both in first and second array:
x & y
=> [5, 3]
Difference (-) contains elements which are present in first array and not present in second array:
x - y
=> [1]
