blocks|key|1962359|text|每次都需要创建一个新对象，并将其归因于最后创建的对象。直到splitted.length，而不是splitted.length+-+1，因为您使用的是<，而不是<=。|type|unstyled|depth|inlineStyleRanges|offset|length|style|CODE|entityRanges|data|1962360|​|1962361|var+packageName+=+"a.b.c.d";
var+splitted+=+packageName.split('.');
var+json+=+{};
var+current+=+json;
for+(var+i+=+0;+i+<+splitted.length;+i%2B%2B)+{
++++current[splitted[i]]+=+{};
++++current+=+current[splitted[i]];
}
console.log(json);|code-block|syntax|javascript|1962362|1962363|entityMap^0|T|F|1C|J|23|1|28|2|0|0|0|0^^$0|@$1|2|3|4|5|6|7|P|8|@$9|Q|A|R|B|C]|$9|S|A|T|B|C]|$9|U|A|V|B|C]|$9|W|A|X|B|C]]|D|@]|E|$]]|$1|F|3|G|5|6|7|Y|8|@]|D|@]|E|$]]|$1|H|3|I|5|J|7|Z|8|@]|D|@]|E|$K|L]]|$1|M|3|G|5|6|7|10|8|@]|D|@]|E|$]]|$1|N|3|-4|5|6|7|11|8|@]|D|@]|E|$]]]|O|$]]

<p>You need to create a new object each time and attribute it to the last object created. And it goes until <code>splitted.length</code>, not <code>splitted.length - 1</code>, because you're using <code>&lt;</code>, not <code>&lt;=</code>.</p>

<p><div class="snippet" data-lang="js" data-hide="false" data-console="true" data-babel="false">
<div class="snippet-code">
<pre class="snippet-code-js lang-js prettyprint-override"><code>var packageName = "a.b.c.d";
var splitted = packageName.split('.');
var json = {};
var current = json;
for (var i = 0; i &lt; splitted.length; i++) {
    current[splitted[i]] = {};
    current = current[splitted[i]];
}
console.log(json);</code></pre>
</div>
</div>
</p>


blocks|key|694629|text|一个很好的reduce用例|type|unstyled|depth|inlineStyleRanges|offset|length|style|CODE|entityRanges|data|694630|​|694631|packageName+=+"a.b.c.d";
initProps+=+{hi:+'there'};

obj+=+packageName.split('.').reduceRight((o,+x)+=>+({[x]:+o}),+initProps);

console.log(JSON.stringify(obj))|code-block|syntax|javascript|694632|694633|如果您发现使用循环更容易，则可以简洁地将循环编写为|694634|result+=+{};
ptr+=+result;

for+(let+prop+of+packageName.split('.'))
++++ptr+=+ptr[prop]+=+{};|694635|entityMap^0|5|6|0|0|0|0|0|0^^$0|@$1|2|3|4|5|6|7|T|8|@$9|U|A|V|B|C]]|D|@]|E|$]]|$1|F|3|G|5|6|7|W|8|@]|D|@]|E|$]]|$1|H|3|I|5|J|7|X|8|@]|D|@]|E|$K|L]]|$1|M|3|G|5|6|7|Y|8|@]|D|@]|E|$]]|$1|N|3|O|5|6|7|Z|8|@]|D|@]|E|$]]|$1|P|3|Q|5|J|7|10|8|@]|D|@]|E|$K|L]]|$1|R|3|-4|5|6|7|11|8|@]|D|@]|E|$]]]|S|$]]

<p>A good use case for <code>reduce</code></p>

<p><div class="snippet" data-lang="js" data-hide="false" data-console="true" data-babel="false">
<div class="snippet-code">
<pre class="snippet-code-js lang-js prettyprint-override"><code>packageName = "a.b.c.d";
initProps = {hi: 'there'};

obj = packageName.split('.').reduceRight((o, x) =&gt; ({[x]: o}), initProps);

console.log(JSON.stringify(obj))</code></pre>
</div>
</div>
</p>

<p>If you find loops easier to work with, a loop could be written concisely as</p>

<pre><code>result = {};
ptr = result;

for (let prop of packageName.split('.'))
    ptr = ptr[prop] = {};
</code></pre>


blocks|key|984609|text|您可以将最后分割的部分用作某些有效负载的属性。|type|unstyled|depth|inlineStyleRanges|entityRanges|data|984610|我建议保留对象引用，并在必要时使用一个临时变量来访问创建一个新属性。|984611|请避免使用JSON来避免字符串对象的使用。|offset|length|984612|​|984613|var+packageName+=+"a.b.c.d",
++++splitted+=+packageName.split('.'),
++++result+=+{},
++++temp+=+result,
++++i;
++
for+(i+=+0;+i+<+splitted.length+-+1;+i%2B%2B)+{
+++temp[splitted[i]]+=+temp[splitted[i]]+%7C%7C+{};
+++temp+=+temp[splitted[i]];
}

temp[splitted[i]]+=+{+some:+'data'+};

console.log(result);|code-block|syntax|javascript|984614|984615|entityMap|0|LINK|mutability|MUTABLE|url|http://json.org/^0|0|0|5|4|0|0|0|0|0^^$0|@$1|2|3|4|5|6|7|X|8|@]|9|@]|A|$]]|$1|B|3|C|5|6|7|Y|8|@]|9|@]|A|$]]|$1|D|3|E|5|6|7|Z|8|@]|9|@$F|10|G|11|1|12]]|A|$]]|$1|H|3|I|5|6|7|13|8|@]|9|@]|A|$]]|$1|J|3|K|5|L|7|14|8|@]|9|@]|A|$M|N]]|$1|O|3|I|5|6|7|15|8|@]|9|@]|A|$]]|$1|P|3|-4|5|6|7|16|8|@]|9|@]|A|$]]]|Q|$R|$5|S|T|U|A|$V|W]]]]

<p>You may use the last splittted part as property for some payload.</p>

<p>I suggest to keep the object reference and use a temporary variable for aceessing an creating a new property, if necessary.</p>

<p>Please avoid the use of <a href="http://json.org/" rel="nofollow noreferrer">JSON</a> for not stringified objects.</p>

<p><div class="snippet" data-lang="js" data-hide="false" data-console="true" data-babel="false">
<div class="snippet-code">
<pre class="snippet-code-js lang-js prettyprint-override"><code>var packageName = "a.b.c.d",
    splitted = packageName.split('.'),
    result = {},
    temp = result,
    i;
  
for (i = 0; i &lt; splitted.length - 1; i++) {
   temp[splitted[i]] = temp[splitted[i]] || {};
   temp = temp[splitted[i]];
}

temp[splitted[i]] = { some: 'data' };

console.log(result);</code></pre>
</div>
</div>
</p>


<p>I have got a <code>.</code> (dot) separated string, from which I want to create nested JSON object. The length of the string is not fixed. For example, </p>

<pre><code>var string = 'a.b.c.d';
</code></pre>

<p>Then my JSON object should be as following:</p>

<pre><code>a: {
    b: {
        c:{
           d: {
                  //Some properties here. 
              }
          } 
    }
}
</code></pre>

<p>I've tried following code: </p>

<pre><code>var packageName = "a.b.c.d"
var splitted = packageName.split('.');
var json = {};
for(var i=0;i&lt;splitted.length-1;i++){
    json[splitted[i]] = splitted[i+1];
}
</code></pre>

<p>But this returns </p>

<pre><code>{
    a: 'b', 
    b: 'c',
    c: 'd'
}
</code></pre>

<p>But this is not what I want. I've also searched on google and found similar questions, but <strong>no solutions answer my problem.</strong> For example <a href="https://stackoverflow.com/questions/10441458/convert-comma-separated-list-into-json-using-javascript">this</a>. </p>


Create nested Javascript Object dynamically

翻译质量差，导致语言生硬或混乱。

没有提供实际的解决方法或示例。

解答不清晰，无法理解或解决问题。

页面排版不美观，阅读体验差。

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我有一个. (点)分隔的字符串，我想从它创建嵌套的JSON对象。字符串的长度不是固定的。例如,var string = 'a.b.c.d';那么我的JSON对象应该如下所示：a: {    b: {        c:{           d: {                  //Some properties...

问动态创建嵌套Javascript对象
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