我正在尝试处理JSON文件：

{
  "features": {
    "additional-options": true
  },
  "values": {
    "lo-value": 34,
    "hi-value": 554
  },
  "persons": [
    {
      "name": "john",
      "member": true,
      "current": false,
      "sponsor": "pete",
      "profile": "",
      "credits": ["04"],
      "linked": ["philip","guy"],
      "maptools": ["crossfit","soccer","running"]
    },
    {
      "name": "mary",
      "member": true,
      "current": false,
      "sponsor": "judy",
      "profile": "",
      "credits": ["all"],
      "activities": ["swimming","cycling","running"]
    }
  ],
  "data_map": [1122,3234]
}

我希望能够：

• 更新键值对上的值
• 删除键/值
• 删除或插入一个数组值

我已经做了很多事情来解决这个问题。

我的简化代码思路是：

require 'json'

hash = JSON.parse(File.read('test.json'))

# Add key & value or change existing one
def change_key(hash, key, value)
    keys = key.strip(".")
    hash[*keys] = value
end

def add_to_array(hash, key, val)
    keys = key.strip(".")
    hash[*keys] = locate_arr(hash, key).insert(val)
end

# Delete a key and it's value
def del_key(hash, key)
    keys = key.strip(".")
    hash[*keys].delete[-1]
end

def del_from_array(hash, key, val)
    keys = key.strip(".")
    hash[*keys] = locate_arr(hash, key).delete[-1]
end

f = File.write('test.json') ; f.puts JSON.pretty_generate(hash)


change_key(hash, "features.additional-options", false)

del_from_array(hash, "persons.name=mary.activities", "cycling")

add_to_array(hash, "persons.name=mary.activities", "hockey")

del_key(hash, "data_map")

del_key(hash, persons.name=john.profile)

del_key(hash, persons.name=mary.credits)

生成的JSON应该是：

{
  "features": {
    "additional-options": false
  },
  "values": {
    "lo-value": 34,
    "hi-value": 554
  },
  "persons": [
    {
      "name": "john",
      "member": true,
      "current": false,
      "sponsor": "pete",
      "credits": ["04"],
      "linked": ["philip","guy"],
      "maptools": ["crossfit","soccer","running"]
    },
    {
      "name": "mary",
      "member": true,
      "current": false,
      "sponsor": "judy",
      "profile": "",
      "activities": ["swimming", "running","hockey"]
    }
  ]
}

我不确定如何使用这种结构的JSON。