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155 lines
2.7 KiB
Markdown
155 lines
2.7 KiB
Markdown
## JSON 扩展函数
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### 1.json\_load
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> 加载 json 数据。
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----------------------------
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#### 原型
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```js
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json_load(str) => object
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json_load(binary) => object
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json_load(data, size) => object
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```
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#### 示例
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```js
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var a = json_load('{"name": "fscript", "age": 100}');
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```
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### 2.json\_save
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> 将对象保存为 json 数据。
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----------------------------
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#### 原型
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```js
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json_save(obj) => binary
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```
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#### 示例
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```js
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var a = json_load('{"name": "fscript", "age": 100}');
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json_save(a);
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```
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### 3.json\_save\_to\_string
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> 将对象保存为字符串数据。
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----------------------------
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#### 原型
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```js
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json_save_to_string(obj) => string
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```
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#### 示例
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```js
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var a = json_load('{"name": "fscript", "age": 100}');
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print(json_save_to_string(a));
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```
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### 4.ubjson\_load
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> 加载 ubjson 数据。
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----------------------------
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#### 原型
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```js
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ubjson_load(binary) => object
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ubjson_load(data, size) => object
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```
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#### 示例
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```js
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var a = ubjson_load(file_read_binary("test.ubjson"));
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```
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### 5.ubjson\_save
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> 将对象保存为 ubjson 数据。
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----------------------------
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#### 原型
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```js
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ubjson_save(obj) => binary
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```
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#### 示例
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```js
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var a = json_load('{"name": "fscript", "age": 100}');
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var b = ubjson_save(a);
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```
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### 完整示例
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```js
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//load from string
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var str='{
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"results": [
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{
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"location": {
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"id": "WS0E9D8WN298",
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"name": "GuangZhou"
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},
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"now": {
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"code": "9",
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"temperature": "30"
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},
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"last_update": "2022-04-28T14:50:00+08:00"
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}
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],
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"name": "fscript",
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"age": 100
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}'
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var a = json_load(str)
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assert(object_get(a, "results.[0].location.id")=="WS0E9D8WN298");
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assert(object_get(a, "results.[0].location.name")=="GuangZhou");
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assert(object_get(a, "results.[0].now.code")=="9");
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assert(object_get(a, "results.[0].now.temperature")=="30");
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assert(object_get(a, "results.[0].last_update")=="2022-04-28T14:50:00+08:00");
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assert(object_get(a, "name")=="fscript");
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assert(object_get(a, "age")==100);
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// 获取数组类型节点的子元素个数
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assert(object_get(a, "results.#size")==1);
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//save to file
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var b=json_save(a)
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assert(file_write("test.json", b))
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//json obj to string
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var c=json_save_to_string(a)
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print(c)
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//load from file as text
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a = json_load(file_read_text("test.json"))
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assert(object_get(a, "name")=="fscript");
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assert(object_get(a, "age")==100);
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//load from file as binary
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a = json_load(file_read_binary("test.json"))
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assert(file_remove("test.json"))
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assert(object_get(a, "name")=="fscript");
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assert(object_get(a, "age")==100);
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assert(file_remove("test.json"))
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unset(a)
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unset(b)
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unset(c)
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unset(str)
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```
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