Ruby |= assignment operator
When working with arrays |= is useful for uniquely appending to an array.
>> x = [1,2,3]>> y = [3,4,5]>> x |= y>> x=> [1, 2, 3, 4, 5]
Bitwise OR assignment.
x |= yis shorthand for:
x = x | y(just like x += y is shorthand for x = x + y).
With the exception of ||= and &&= which have special semantics, all compound assignment operators are translated according to this simple rule:
a ω= bis the same as
a = a ω bThus,
a |= bis the same as
a = a | b