Ruby 迭代包含哈希和/或数组的嵌套哈希

我有一个散列，我试图提取它的键和值。哈希具有嵌套哈希和/或哈希数组

在检查了这个网站和一些样本后，我得到了密钥和值。但是如果它是一个散列数组，则很难提取

例如：

{
  :key1 => 'value1',
  :key2 => 'value2',
  :key3 => {
    :key4 => [{:key4_1 => 'value4_1', :key4_2 => 'value4_2'}],
    :key5 => 'value5'
  },
  :key6 => {
    :key7 => [1,2,3],
    :key8 => {
      :key9 => 'value9'
    }
  }
}

到目前为止，我有以下代码来自和

但是它在

v.is\u散列？（数组）

或

v.is\u？（数组）

时失败

---

我遗漏了什么吗？

如果v是数组或散列，那么您正在调用ihash（v）。数组的每个\u pair方法调用都将失败。

您可以跳过递归并使用类似的方法：

a = {}
a[0] = { first: "first" }
a[1] = [{ second: "second_1" }, { second: "second_2" }]

a.each_pair do |k1, v1|
  puts "======== key: #{k1}, value: ========"

  if v1.class == Hash
    v1.each_pair do |k2, v2|
      puts "key_2: #{k2}, value: #{v2}"
    end
  else
    v1.each do |h|
      h.each_pair do |k2, v2|
        puts "hash #{v1.index(h)} => key_2: #{k2}, value: #{v2}"
      end
    end
  end
end

def iterate(h)
  h.each do |k,v|
    # If v is nil, an array is being iterated and the value is k. 
    # If v is not nil, a hash is being iterated and the value is v.
    # 
    value = v || k

    if value.is_a?(Hash) || value.is_a?(Array)
      puts "evaluating: #{value} recursively..."
      iterate(value)
    else
      # MODIFY HERE! Look for what you want to find in the hash here
      # if v is nil, just display the array value
      puts v ? "key: #{k} value: #{v}" : "array value #{k}"
    end
  end
end

输出：

======== key: 0, value: ========
key_2: first, value: first
======== key: 1, value: ========
hash 0 => key_2: second, value: second_1
hash 1 => key_2: second, value: second_2

---

您可能想要什么还不完全清楚，但同时需要和实现

每个

（在

哈希

的情况下，它是每个

对的别名）

因此，要准确地获得方法有效时所能获得的输出，可以如下实现：

a = {}
a[0] = { first: "first" }
a[1] = [{ second: "second_1" }, { second: "second_2" }]

a.each_pair do |k1, v1|
  puts "======== key: #{k1}, value: ========"

  if v1.class == Hash
    v1.each_pair do |k2, v2|
      puts "key_2: #{k2}, value: #{v2}"
    end
  else
    v1.each do |h|
      h.each_pair do |k2, v2|
        puts "hash #{v1.index(h)} => key_2: #{k2}, value: #{v2}"
      end
    end
  end
end

def iterate(h)
  h.each do |k,v|
    # If v is nil, an array is being iterated and the value is k. 
    # If v is not nil, a hash is being iterated and the value is v.
    # 
    value = v || k

    if value.is_a?(Hash) || value.is_a?(Array)
      puts "evaluating: #{value} recursively..."
      iterate(value)
    else
      # MODIFY HERE! Look for what you want to find in the hash here
      # if v is nil, just display the array value
      puts v ? "key: #{k} value: #{v}" : "array value #{k}"
    end
  end
end

你的预期产出是多少？