ruby - 如何让自己的 def 类充当 ruby​​ 中的数组？

Question

class Heap
  attr_accessor :a, :heap_size
  def initialnize(a, heap_size)
    @a = a
    @heap_size = heap_size
  end
end
a = [16, 14, 10, 8, 7, 9, 3, 2, 4, 1]
a = Heap.new(a, a.length-1)

我该怎么办？然后我可以使用 a[i] 等访问 16。

Answer 1

您可以简单地使用继承:

class Heap < Array
  attr_accessor :heap_size
  def initialize(a, heap_size)
    @heap_size = heap_size
    super(a)
  end
end
a = [16, 14, 10, 8, 7, 9, 3, 2, 4, 1]
heap = Heap.new(a, a.length-1)
heap[0]
# => 16