12 lines
448 B
Ruby
12 lines
448 B
Ruby
s = Stack.new
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s.empty? # => true
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s.pop # => nil
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s.pop(1) # => []
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s.push(1) # => Stack[1]
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s.push(2, 3) # => Stack[1, 2, 3]
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s.pop # => 3
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s.pop(1) # => [2]
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s.empty? # => false
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s = Stack[:a, :b, :c]
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s.pop # => :c
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