Arrays Ruby附加到数组

在下面的代码行中，我预期的结果与实际结果不同。有人能帮我理解为什么吗

array1 = [["a", "b", "c"], ["a", "b", "c"]]
temp1 = ["x", "y", "z"]
array1 << temp1

2.times do
  temp1[0] = gets.chomp      #first loop enter 1 and then 4
  temp1[1] = gets.chomp      #first loop enter 2 and then 5
  temp1[2] = gets.chomp      #first loop enter 3 and then 6
  puts temp1.inspect
  array1 << temp1
  puts array1.inspect        
  # Actual result: [["a", "b", "c"], ["a", "b", "c"], ["4", "5", "6"], ["4", "5", "6"], ["4", "5", "6"]]                          
  # Expected Result: [["a", "b", "c"], ["a", "b", "c"], ["x", "y", "z"], ["1", "2", "3"], ["4", "5", "6"]]
end

array1=[[“a”、“b”、“c”]、[“a”、“b”、“c”]]
temp1=[“x”、“y”、“z”]
array1执行此操作，它将起作用（将.clone添加到对
temp1
的所有引用中）：

array1=[[“a”、“b”、“c”]、[“a”、“b”、“c”]]
temp1=[“x”、“y”、“z”]
array1执行此操作，它将起作用（将.clone添加到对
temp1
的所有引用中）：

array1=[[“a”、“b”、“c”]、[“a”、“b”、“c”]]
temp1=[“x”、“y”、“z”]
array1每当您遇到像这样的问题时，添加一些代码以在计算的每个步骤中打印出每个感兴趣对象的
对象id
，这是很有指导意义的。每个Ruby对象都有一个唯一的
对象id
。可以使用以下方法检索id：

让我们试试看。（我已将
对象id
缩短到最后三位，以便在更改时更容易看到。）

你需要仔细研究这一点

要理解发生了什么，将数组视为容器可能会有所帮助。您所做的是更改容器的内容，而不是容器本身，但是
array1
是一个容器列表

要使代码正常工作，只需更改容器和内容。一种简单的方法是替换：

temp1[0] = gets.chomp
temp1[1] = gets.chomp
temp1[2] = gets.chomp

与

每当您遇到类似这样的问题时，添加一些代码以在计算的每个步骤中打印出每个感兴趣对象的
object\u id
，这是很有指导意义的。每个Ruby对象都有一个唯一的
对象id
。可以使用以下方法检索id：

让我们试试看。（我已将
对象id
缩短到最后三位，以便在更改时更容易看到。）

你需要仔细研究这一点

要理解发生了什么，将数组视为容器可能会有所帮助。您所做的是更改容器的内容，而不是容器本身，但是
array1
是一个容器列表

要使代码正常工作，只需更改容器和内容。一种简单的方法是替换：

temp1[0] = gets.chomp
temp1[1] = gets.chomp
temp1[2] = gets.chomp

与

您正在追加和修改同一数组。为什么即使我追加到同一数组，它也不是连续的？（因此，第一个循环我将1,2,3附加到数组1，然后再附加4,5,6）（我是新手）不，你是在附加和变异同一个数组。在123时追加一次。然后将其更改为456，这意味着您已经附加的更改为456，然后再次附加。您正在附加和修改同一数组。为什么即使我附加到同一数组，它也不是顺序的？（因此，第一个循环我将1,2,3附加到数组1，然后再附加4,5,6）（我是新手）不，你是在附加和变异同一个数组。在123时追加一次。然后您将其更改为456，这意味着您已经添加的内容将更改为456，然后您将再次添加它。我很高兴它有帮助：）我很高兴它有帮助：）
array1 = [["a", "b", "c"], ["a", "b", "c"]]
puts "1a array1.object_id=#{array1.object_id % 1000}"
puts "1b array1.map(&:object_id)=#{array1.map { |e| e.object_id % 1000 } }"
puts
temp1 = ["x", "y", "z"]
puts "2a temp1.object_id=#{temp1.object_id % 1000}"
array1 << temp1
puts "2b array1=#{array1.inspect}"
puts "2c array1.object_id=#{array1.object_id % 1000}"
puts "2d array1.map(&:object_id)=#{array1.map { |e| e.object_id % 1000 } }"
puts
2.times do
  temp1[0] = gets.chomp
  temp1[1] = gets.chomp
  temp1[2] = gets.chomp
  puts "3a temp1=#{temp1.inspect}"
  puts "3b temp1.object_id=#{temp1.object_id % 1000}"
  array1 << temp1
  puts "3c array1=#{array1.inspect}"
  puts "3d array1.object_id=#{array1.object_id % 1000}"
  puts "3e array1.map(&:object_id)=#{array1.map { |e| e.object_id % 1000 } }"
  puts 
end

1a array1.object_id=900
1b array1.map(&:object_id)=[0, 920]

2a temp1.object_id=480
2b array1=[["a", "b", "c"], ["a", "b", "c"], ["x", "y", "z"]]
2c array1.object_id=900
2d array1.map(&:object_id)=[0, 920, 480]

1
2
3
3a temp1=["1", "2", "3"]
3b temp1.object_id=480
3c array1=[["a", "b", "c"], ["a", "b", "c"], ["1", "2", "3"], ["1", "2", "3"]]
3d array1.object_id=900
3e array1.map(&:object_id)=[0, 920, 480, 480]

4
5
6
3a temp1=["4", "5", "6"]
3b temp1.object_id=480
3c array1=[["a", "b", "c"], ["a", "b", "c"], ["4", "5", "6"], ["4", "5", "6"],
           ["4", "5", "6"]]
3d array1.object_id=900
3e array1.map(&:object_id)=[0, 920, 480, 480, 480]

temp1[0] = gets.chomp
temp1[1] = gets.chomp
temp1[2] = gets.chomp

temp1 = [gets.chomp, gets.chomp, gets.chomp]

array1 = [["a", "b", "c"], ["a", "b", "c"]]
puts "1a array1.object_id=#{array1.object_id % 1000}"
puts "1b array1.map(&:object_id)=#{array1.map { |e| e.object_id % 1000 } }"
puts
temp1 = ["x", "y", "z"]
puts "2a temp1.object_id=#{temp1.object_id % 1000}"
array1 << temp1
puts "2b array1=#{array1.inspect}"
puts "2c array1.object_id=#{array1.object_id % 1000}"
puts "2d array1.map(&:object_id)=#{array1.map { |e| e.object_id % 1000 } }"
puts
2.times do
  temp1 = [gets.chomp, gets.chomp, gets.chomp]
  puts "3a temp1=#{temp1.inspect}"
  puts "3b temp1.object_id=#{temp1.object_id % 1000}"
  array1 << temp1
  puts "3c array1=#{array1.inspect}"
  puts "3d array1.object_id=#{array1.object_id % 1000}"
  puts "3e array1.map(&:object_id)=#{array1.map { |e| e.object_id % 1000 } }"
  puts 
end

1a array1.object_id=100
1b array1.map(&:object_id)=[220, 120]

2a temp1.object_id=660
2b array1=[["a", "b", "c"], ["a", "b", "c"], ["x", "y", "z"]]
2c array1.object_id=100
2d array1.map(&:object_id)=[220, 120, 660]

1
2
3
3a temp1=["1", "2", "3"]
3b temp1.object_id=800
3c array1=[["a", "b", "c"], ["a", "b", "c"], ["x", "y", "z"], ["1", "2", "3"]]
3d array1.object_id=100
3e array1.map(&:object_id)=[220, 120, 660, 800]

4
5
6
3a temp1=["4", "5", "6"]
3b temp1.object_id=580
3c array1=[["a", "b", "c"], ["a", "b", "c"], ["x", "y", "z"], ["1", "2", "3"],
           ["4", "5", "6"]]
3d array1.object_id=100
3e array1.map(&:object_id)=[220, 120, 660, 800, 580]