json - 将键值数组存储到紧凑的JSON字符串中

Question

我想存储一个键值项数组，执行此操作的常用方法可能是：

// the JSON data may store several data types, not just key value lists,
// but, must be able to identify some data as a key value list

// --> more "common" way to store a key value array
{
  [
    {"key": "slide0001.html", "value": "Looking Ahead"},
    {"key": "slide0008.html", "value": "Forecast"},
    {"key": "slide0021.html", "value": "Summary"},
    // another THOUSANDS KEY VALUE PAIRS
    // ...
  ],
  "otherdata" : { "one": "1", "two": "2", "three": "3" }
}

但是，如果有很多对/项目，则字符串长度会被禁止，
我想要一个紧凑的方法，这可能是一个示例：

// --> (1) a "compact" way to store a key value array
{    
  [
      {"slide0001.html", "Looking Ahead"},
      {"slide0008.html", "Forecast"},
      {"slide0021.html", "Summary"},
      // another THOUSANDS KEY VALUE PAIRS
      // ...
  ],
  "otherdata" : { "one": "1", "two": "2", "three": "3" }
}

另外，我想要一种将数据标识为键值数组的方法，
因为，我可能想将其他数据存储在同一JSON文件中。
我有这些例子：

// --> (2) a "compact" way to store a key value array    
{
    "keyvaluelist":
    [
      {"slide0001.html", "Looking Ahead"},
      {"slide0008.html", "Forecast"},
      {"slide0021.html", "Summary"},
      // another THOUSANDS KEY VALUE PAIRS
      // ...
    ],
    "otherdata" : { "one": "1", "two": "2", "three": "3" }
}

// --> (3) a "compact" way to store a key value array    
{
    "mylist":
    {
      "type": "keyvaluearray",
  "data":
    [
        {"slide0001.html", "Looking Ahead"},
        {"slide0008.html", "Forecast"},
        {"slide0021.html", "Summary"},
                    // another THOUSANDS KEY VALUE PAIRS
                    // ...
    ]
    },
    "otherdata" : { "one": "1", "two": "2", "three": "3" }
}

您有什么建议，您建议哪个，还有其他方法吗？
谢谢。

更新1：删除无效的代码。 Javascript => JSON

更新2：添加非键值数据

更新3：在每个键值对中将“ [”和“]”替换为“ {”和“}”

Answer 1

如果解析此逻辑知道{"key": "slide0001.html", "value": "Looking Ahead"}是键/值对，则可以将其转换为数组并保存一些常量，这些常量指定哪个索引映射到哪个键。

例如：

var data = ["slide0001.html", "Looking Ahead"];

var C_KEY = 0;
var C_VALUE = 1;

var value = data[C_VALUE];

因此，现在，您的数据可以是：

[
    ["slide0001.html", "Looking Ahead"],
    ["slide0008.html", "Forecast"],
    ["slide0021.html", "Summary"]
]

如果您的解析逻辑事先不了解数据的结构，则可以添加一些元数据来描述它。例如：

{ meta: { keys: [ "key", "value" ] },
  data: [
    ["slide0001.html", "Looking Ahead"],
    ["slide0008.html", "Forecast"],
    ["slide0021.html", "Summary"]
  ]
}

...然后由解析器处理。