manage_set_elements

➕➖ Add and Remove Elements

Sets support add (or <<) to include items and delete to remove them, ensuring uniqueness is always maintained. This is useful when collecting input that must stay distinct. Use these methods to dynamically adjust your set.

require 'set'

numbers = Set.new([1, 2, 3])
numbers.add(4)
numbers << 2   # no effect, 2 already exists
numbers.delete(3)
puts numbers.inspect
# => #<Set: {1, 2, 4}>