值为"ok"，false，true，null，123有效的JSON吗? [英] Are values "ok", false, true, null, 123 valid JSON

问题描述

以下字符串中是否包含有效的JSON?

Are following strings a valid JSON?

"ok"

false

true

null

123

如果不是，为什么标准javascript JSON.parse方法允许将此值用作有效JSON?

If not why do standard javascript JSON.parse method allow to use this values as valid JSON?

在实现JSON REST API时，有时会使用此值，并且面对Objective-C框架不会解析此值.

I sometimes use this values when implementing JSON REST APIs, and faced with that objective-c frameworks doesn't parse this values.

推荐答案

严格来说，这些值本身不是有效的JSON，这将需要对象包装器{}(以及键值对的配置)或数组它们周围的包装器[].但是，有许多JSON序列化库允许使用非嵌套原语，如您所示.最好不要依赖此行为，除非您特别知道两端都将使用哪个JSON序列化/反序列化库，并且可以验证它们都以相同的方式支持此行为.

Strictly speaking, those values by themselves are not valid JSON, which would require either an object wrapper {} (and configuration as key-value pair) or array wrapper [] around them. There are however many JSON serialization libraries that allow for use of non-nested primitives as you have shown. It is probably best to not rely on this behavior unless you specifically know which JSON serialization/deserialization libraries will be in use on both ends and can verify that they both support this behavior in the same manner.

这篇关于值为"ok"，false，true，null，123有效的JSON吗?的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！