20 lines
798 B
Ruby
20 lines
798 B
Ruby
p s = Stack.new # => Stack[]
|
|
p s.empty? # => true
|
|
p s.size # => 0
|
|
p s.top # => nil
|
|
p s.pop # => nil
|
|
p s.pop(1) # => []
|
|
p s.push(1) # => Stack[1]
|
|
p s.push(2, 3) # => Stack[1, 2, 3]
|
|
p s.top # => 3
|
|
p s.top(2) # => [2, 3]
|
|
p s # => Stack[1, 2, 3]
|
|
p s.size # => 3
|
|
p s.pop # => 3
|
|
p s.pop(1) # => [2]
|
|
p s.empty? # => false
|
|
|
|
p s = Stack[:a, :b, :c] # => Stack[:a, :b, :c]
|
|
p s << :d # => Stack[:a, :b, :c, :d]
|
|
p s.pop # => :d
|