Rubyの参照の値渡しのテスト

ruby

class Sample
  def array_change_all(v)
    p 'value method start'
    p v.object_id
    v = [10, 2, 3]
    p v.object_id
    p 'value method end'
  end
  def array_change_one(v)
    p 'value method start'
    p v.object_id
    v[0] = 10
    p v.object_id
    p 'value method end'
  end
  def num(v)
    p 'value method start'
    p v.object_id
    v = 10
    p v.object_id
    p 'value method end'
  end
end

p a = Sample.new
b = a
c = b
p d = Sample.new
p "a id : #{a.object_id}"
p "b id : #{b.object_id}"
p "c id : #{c.object_id}"
p "d id : #{d.object_id}"
p "a and b is identity? : #{a.eql?(b)}"
p "c and b is identity? : #{c.eql?(b)}"
p "a and d is same value? : #{a == d}"
p "a and d is identity? #{a.eql?(d)}"
p array = [1,2,3]
p "array id is : #{array.object_id}"
a.array_change_all(array)
p "return array value is : #{array}"
p "array id is : #{array.object_id}"
a.array_change_one(array)
p "return array value is : #{array}"
p "array id is : #{array.object_id}"
p int1 =1
p "int1 id is : #{int1.object_id}"
a.num(int1)
p "int1 id is : #{int1.object_id}"