blocks|key|1368664|text|据我所知，这不是标准的。快速浏览一下http://json.org/就可以证实这一点。|type|unstyled|depth|inlineStyleRanges|entityRanges|offset|length|data|1368665|entityMap|0|LINK|mutability|MUTABLE|url|http://json.org/^0|I|G|0|0^^$0|@$1|2|3|4|5|6|7|L|8|@]|9|@$A|M|B|N|1|O]]|C|$]]|$1|D|3|-4|5|6|7|P|8|@]|9|@]|C|$]]]|E|$F|$5|G|H|I|C|$J|K]]]]

It is not standard as far as I know. A quick look at <a href="http://json.org/" rel="noreferrer">http://json.org/</a> confirms this.

blocks|key|1153622|text|JSON显式地排除了函数，因为它不是仅用于JavaScript的数据结构(尽管名称中有JS+)。|type|unstyled|depth|inlineStyleRanges|entityRanges|data|1153623|entityMap^0|0^^$0|@$1|2|3|4|5|6|7|D|8|@]|9|@]|A|$]]|$1|B|3|-4|5|6|7|E|8|@]|9|@]|A|$]]]|C|$]]

JSON explicitly excludes functions because it isn't meant to be a JavaScript-only data
structure (despite the JS in the name).

blocks|key|1368741|text|不，绝对不是。|type|unstyled|depth|inlineStyleRanges|entityRanges|data|1368742|如果您使用一个像样的JSON序列化程序，它不会让您序列化这样的函数。它是一个有效的对象，但不是有效的JSON。无论该网站的意图是什么，它都不会发送有效的JSON。|1368743|entityMap^0|0|0^^$0|@$1|2|3|4|5|6|7|F|8|@]|9|@]|A|$]]|$1|B|3|C|5|6|7|G|8|@]|9|@]|A|$]]|$1|D|3|-4|5|6|7|H|8|@]|9|@]|A|$]]]|E|$]]

Nope, definitely not. 

If you use a decent JSON serializer, it won't let you serialize a function like that. It's a valid OBJECT, but not valid JSON. Whatever that website's intent, it's not sending valid JSON.

blocks|key|1368923|text|通过使用NodeJS+(+JSON语法)，我能够让这种类型的功能工作，我最初只在一些外部JS文件中有一个commonJS结构，但我希望这个结构更像是一个类，具有可以在运行时决定的方法。|type|unstyled|depth|inlineStyleRanges|entityRanges|data|1368924|myJSON中的“Executor”声明不是必需的。|1368925|var+myJSON+=+{
++++"Hello":+"World",
++++"Executor":+""
}

module.exports+=+{
++++init:+()+=>+{+return+{+...myJSON,+"Executor":+(first,+last)+=>+{+return+first+%2B+last+}+}+}
}|code-block|syntax|javascript|1368926|entityMap^0|0|0|0^^$0|@$1|2|3|4|5|6|7|K|8|@]|9|@]|A|$]]|$1|B|3|C|5|6|7|L|8|@]|9|@]|A|$]]|$1|D|3|E|5|F|7|M|8|@]|9|@]|A|$G|H]]|$1|I|3|-4|5|6|7|N|8|@]|9|@]|A|$]]]|J|$]]

Via using NodeJS (commonJS syntax) I was able to get this type of functionality working, I originally had just a JSON structure inside some external JS file, but I wanted that structure to be more of a Class, with methods that could be decided at run time. 

The declaration of 'Executor' in myJSON is not required.

<pre><code>var myJSON = {
 "Hello": "World",
 "Executor": ""
}

module.exports = {
 init: () =&gt; { return { ...myJSON, "Executor": (first, last) =&gt; { return first + last } } }
}
</code></pre>

blocks|key|1153763|text|JSON中的函数表达式是完全可能的，只是不要忘了用双引号括起来。下面是一个取自noSQL数据库设计的例子：|type|unstyled|depth|inlineStyleRanges|entityRanges|data|1153764|{
++"_id":+"_design/testdb",
++"views":+{
++++"byName":+{
++++++"map":+"function(doc){if(doc.name){emit(doc.name,doc.code)}}"
++++}
++}
}|code-block|syntax|javascript|1153765|entityMap^0|0|0^^$0|@$1|2|3|4|5|6|7|I|8|@]|9|@]|A|$]]|$1|B|3|C|5|D|7|J|8|@]|9|@]|A|$E|F]]|$1|G|3|-4|5|6|7|K|8|@]|9|@]|A|$]]]|H|$]]

Function expressions in the JSON are completely possible, just do not forget to wrap it in double quotes. Here is an example taken from noSQL database design:
<pre class="lang-json prettyprint-override"><code>{
 &quot;_id&quot;: &quot;_design/testdb&quot;,
 &quot;views&quot;: {
 &quot;byName&quot;: {
 &quot;map&quot;: &quot;function(doc){if(doc.name){emit(doc.name,doc.code)}}&quot;
 }
 }
}
</code></pre>

blocks|key|1153802|text|尽管不推荐使用eval，但它仍然有效：|type|unstyled|depth|inlineStyleRanges|entityRanges|data|1153803|<!DOCTYPE+html>
<html>
<body>

<h2>Convert+a+string+written+in+JSON+format,+into+a+JavaScript+function.</h2>

<p+id="demo">

<script>
++++function+test(val){return+val+%2B+"+it's+OK;}
++++var+someVar+=+"yup";
++++var+myObj+=+{+"func":+"test(someVar);"+};
++++document.getElementById("demo").innerHTML+=+eval(myObj.func);
</script>

</body>
</html>|code-block|syntax|javascript|1153804|entityMap^0|0|0^^$0|@$1|2|3|4|5|6|7|I|8|@]|9|@]|A|$]]|$1|B|3|C|5|D|7|J|8|@]|9|@]|A|$E|F]]|$1|G|3|-4|5|6|7|K|8|@]|9|@]|A|$]]]|H|$]]

although eval is not recommended, this works:

<pre><code>&lt;!DOCTYPE html&gt;
&lt;html&gt;
&lt;body&gt;

&lt;h2&gt;Convert a string written in JSON format, into a JavaScript function.&lt;/h2&gt;

&lt;p id="demo"&gt;&lt;/p&gt;

&lt;script&gt;
 function test(val){return val + " it's OK;}
 var someVar = "yup";
 var myObj = { "func": "test(someVar);" };
 document.getElementById("demo").innerHTML = eval(myObj.func);
&lt;/script&gt;

&lt;/body&gt;
&lt;/html&gt;
</code></pre>

blocks|key|1153717|text|去掉引号...|type|unstyled|depth|inlineStyleRanges|entityRanges|data|1153718|var+a+=+{"b":function(){alert('hello+world');}+};

a.b();|code-block|syntax|javascript|1153719|entityMap^0|0|0^^$0|@$1|2|3|4|5|6|7|I|8|@]|9|@]|A|$]]|$1|B|3|C|5|D|7|J|8|@]|9|@]|A|$E|F]]|$1|G|3|-4|5|6|7|K|8|@]|9|@]|A|$]]]|H|$]]

Leave the quotes off...

<pre><code>var a = {"b":function(){alert('hello world');} };

a.b();
</code></pre>

Part of a website's JSON response had this (... added for context):

<pre><code>{..., now:function(){return(new Date).getTime()}, ...}
</code></pre>

Is adding anonymous functions to JSON valid? I would expect each time you access 'time' to return a different value.

Is it valid to define functions in JSON results?

数据结构

SQL数据库

数据库

JSON

一个网站的JSON响应的一部分有这个(...为上下文添加)：{..., now:function(){return(new Date).getTime()}, ...}向JSON添加匿名函数有效吗？我希望你每次访问“time”都会返回一个不同的值。

问在JSON结果中定义函数是否有效？
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