PoorPriorityQueue

# File lib/priority_queue/poor_priority_queue.rb, line 40
def delete(object)
  return nil unless self.has_key?(object) 
  result = [object, self[object]]
  super
  result
end

# File lib/priority_queue/poor_priority_queue.rb, line 25
def delete_min
  return nil if self.empty?
  min_k, min_p = *min
  self.delete(min_k)
  [min_k, min_p]
end

# File lib/priority_queue/poor_priority_queue.rb, line 32
def delete_min_return_key
  delete_min[0] rescue nil
end

# File lib/priority_queue/poor_priority_queue.rb, line 36
def delete_min_return_priority
  delete_min[1] rescue nil
end

# File lib/priority_queue/poor_priority_queue.rb, line 7
def min
  return nil if self.empty?
  min_k = self.keys.first
  min_p = self[min_k]
  self.each do | k, p |
    min_k, min_p = k, p if p < min_p
  end
  [min_k, min_p]
end

# File lib/priority_queue/poor_priority_queue.rb, line 17
def min_key
  min[0] rescue nil
end

# File lib/priority_queue/poor_priority_queue.rb, line 21
def min_priority
  min[1] rescue nil
end

# File lib/priority_queue/poor_priority_queue.rb, line 3
def push(object, priority)
  self[object] = priority
end