Method: Set#add

Defined in:

lib/set.rb

#add(o) ⇒ Object Also known as: <<

Adds the given object to the set and returns self. Use ‘merge` to add many elements at once.

Set[1, 2].add(3)                    #=> #<Set: {1, 2, 3}>
Set[1, 2].add([3, 4])               #=> #<Set: {1, 2, [3, 4]}>
Set[1, 2].add(2)                    #=> #<Set: {1, 2}>

# File 'lib/set.rb', line 514

def add(o)
  @hash[o] = true
  self
end