Contents

module Whitespace
  class Stack
    def initialize
      @elements = []
    end

    def push(x)
      @elements.push x
    end

    def pop
      return @elements.pop unless @elements.empty?
      raise EmptyError
    end

    def top
      return @elements.last unless @elements.empty?
      raise EmptyError
    end

    def size
      @elements.size
    end
  end
end

Version data entries

1 entries across 1 versions & 1 rubygems

Version	Path
whitespace-ruby-1.0.0	lib/whitespace/data_structures/stack.rb