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instance method

Set#add

add(o)

# File tmp/rubies/ruby-3.0.5/lib/set.rb, line 354
def add(o)
  @hash[o] = true
  self
end

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

Example

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}>

See also #add? #| #^ #as_json also in 4.1 · 4.0 · 3.4 · 3.3 · 3.2 · 3.1

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