blocks|key|598360|text|您可以迭代数组中的每个项，并使用ID+proeprty作为javascript对象key和LABEL作为value。|type|unstyled|depth|inlineStyleRanges|offset|length|style|CODE|entityRanges|data|598361|​|598362|var+value+=+[{ID:+0,+LABEL:+"turbo"},+{ID:+1,+LABEL:+"classic"}];

let+theNewMap+=+{};
for(var+i+=+0;+i+<+value.length;+i%2B%2B)+{
++theNewMap[value[i].ID]+=+value[i].LABEL;
}

//+theNewMap+Should+now+be+a+map+with+'id'+as+key,+and+'label'+as+value
console.log(JSON.stringify(theNewMap+))|code-block|syntax|javascript|598363|598364|entityMap^0|G|2|15|3|19|5|1G|5|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 can iterator over each item in the array, and use the <code>ID</code> proeprty as a javascript objects <code>key</code> and the <code>LABEL</code> as the <code>value</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 value = [{ID: 0, LABEL: "turbo"}, {ID: 1, LABEL: "classic"}];

let theNewMap = {};
for(var i = 0; i &lt; value.length; i++) {
  theNewMap[value[i].ID] = value[i].LABEL;
}

// theNewMap Should now be a map with 'id' as key, and 'label' as value
console.log(JSON.stringify(theNewMap ))</code></pre>
</div>
</div>
</p>


blocks|key|2043500|text|这可以通过调用值数组上的reduce+(即data)来获得所需的哈希映射(其中ID是键，值是对应的LABEL)来实现：|type|unstyled|depth|inlineStyleRanges|offset|length|style|CODE|entityRanges|data|2043501|​|2043502|const+data+=+[
{ID:+0,+LABEL:+'turbo'},
{ID:+1,+LABEL:+'classic'},
{ID:+7,+LABEL:+'unknown'}
];

const+hashMap+=+data.reduce((result,+item)+=>+{
++return+{+...result,+[+item.ID+]+:+item.LABEL+};
},+{});

const+hashMapJson+=+JSON.stringify(hashMap);

console.log('hashMap',+hashMap);
console.log('hashMapJson',+hashMapJson);
+
/*
More+concise+syntax:
console.log(data.reduce((result,+{+ID,+LABEL+})+=>+({+...result,+[+ID+]+:+LABEL+}),+{}))
*/|code-block|syntax|javascript|2043503|2043504|entityMap|0|LINK|mutability|MUTABLE|url|https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Array/Reduce^0|C|6|L|4|13|2|1D|5|C|6|0|0|0|0|0^^$0|@$1|2|3|4|5|6|7|V|8|@$9|W|A|X|B|C]|$9|Y|A|Z|B|C]|$9|10|A|11|B|C]|$9|12|A|13|B|C]]|D|@$9|14|A|15|1|16]]|E|$]]|$1|F|3|G|5|6|7|17|8|@]|D|@]|E|$]]|$1|H|3|I|5|J|7|18|8|@]|D|@]|E|$K|L]]|$1|M|3|G|5|6|7|19|8|@]|D|@]|E|$]]|$1|N|3|-4|5|6|7|1A|8|@]|D|@]|E|$]]]|O|$P|$5|Q|R|S|E|$T|U]]]]

<p>This could be achieved by calling <a href="https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Array/Reduce" rel="nofollow noreferrer"><code>reduce</code></a> on your array of values (ie <code>data</code>), to obtain the required hash map (where <code>ID</code> is the key and value is the corresponding <code>LABEL</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>const data = [
{ID: 0, LABEL: 'turbo'},
{ID: 1, LABEL: 'classic'},
{ID: 7, LABEL: 'unknown'}
];

const hashMap = data.reduce((result, item) =&gt; {
  return { ...result, [ item.ID ] : item.LABEL };
}, {});

const hashMapJson = JSON.stringify(hashMap);

console.log('hashMap', hashMap);
console.log('hashMapJson', hashMapJson);
 
/*
More concise syntax:
console.log(data.reduce((result, { ID, LABEL }) =&gt; ({ ...result, [ ID ] : LABEL }), {}))
*/</code></pre>
</div>
</div>
</p>


blocks|key|598415|text|您可以使用forEach方法。|type|unstyled|depth|inlineStyleRanges|entityRanges|offset|length|data|598416|>+var+hmap+=+{};
undefined
>+var+value+=+[{ID:+0,+LABEL:+"turbo"},+{ID:+1,+LABEL:+"classic"}]
undefined
>+value.forEach(function(element){
...+hmap[element.ID]+=+element.LABEL;
...+});
>+hmap
{+'0':+'turbo',+'1':+'classic'+}|code-block|syntax|javascript|598417|或|598418|var+value+=+[{ID:+0,+LABEL:+"turbo"},+{ID:+1,+LABEL:+"classic"}]
var+hmap+=+{};
value.forEach(function(element){
++++hmap[element.ID]+=+element.LABEL;
});
console.log(hmap);|598419|entityMap|0|LINK|mutability|MUTABLE|url|https://www.w3schools.com/jsref/jsref_foreach.asp^0|5|7|0|0|0|0|0^^$0|@$1|2|3|4|5|6|7|U|8|@]|9|@$A|V|B|W|1|X]]|C|$]]|$1|D|3|E|5|F|7|Y|8|@]|9|@]|C|$G|H]]|$1|I|3|J|5|6|7|Z|8|@]|9|@]|C|$]]|$1|K|3|L|5|F|7|10|8|@]|9|@]|C|$G|H]]|$1|M|3|-4|5|6|7|11|8|@]|9|@]|C|$]]]|N|$O|$5|P|Q|R|C|$S|T]]]]

<p>You can use <a href="https://www.w3schools.com/jsref/jsref_foreach.asp" rel="nofollow noreferrer">forEach</a> method.</p>

<pre><code>&gt; var hmap = {};
undefined
&gt; var value = [{ID: 0, LABEL: "turbo"}, {ID: 1, LABEL: "classic"}]
undefined
&gt; value.forEach(function(element){
... hmap[element.ID] = element.LABEL;
... });
&gt; hmap
{ '0': 'turbo', '1': 'classic' }
</code></pre>

<p>or</p>

<pre><code>var value = [{ID: 0, LABEL: "turbo"}, {ID: 1, LABEL: "classic"}]
var hmap = {};
value.forEach(function(element){
    hmap[element.ID] = element.LABEL;
});
console.log(hmap);
</code></pre>


blocks|key|598431|text|尝试(其中h={})|type|unstyled|depth|inlineStyleRanges|entityRanges|data|598432|data.map(x=>+h[x.ID]=x.LABEL+);|code-block|syntax|javascript|598433|​|598434|const+data+=+[
++{ID:+0,+LABEL:+'turbo'},
++{ID:+1,+LABEL:+'classic'},
++{ID:+3,+LABEL:+'abc'}
];

let+h={}
data.map(x=>+h[x.ID]=x.LABEL+);

console.log(h);|598435|598436|entityMap^0|0|0|0|0|0^^$0|@$1|2|3|4|5|6|7|N|8|@]|9|@]|A|$]]|$1|B|3|C|5|D|7|O|8|@]|9|@]|A|$E|F]]|$1|G|3|H|5|6|7|P|8|@]|9|@]|A|$]]|$1|I|3|J|5|D|7|Q|8|@]|9|@]|A|$E|F]]|$1|K|3|H|5|6|7|R|8|@]|9|@]|A|$]]|$1|L|3|-4|5|6|7|S|8|@]|9|@]|A|$]]]|M|$]]

<p>Try (where h={})</p>

<pre><code>data.map(x=&gt; h[x.ID]=x.LABEL );
</code></pre>

<p><div class="snippet" data-lang="js" data-hide="true" data-console="true" data-babel="false">
<div class="snippet-code snippet-currently-hidden">
<pre class="snippet-code-js lang-js prettyprint-override"><code>const data = [
  {ID: 0, LABEL: 'turbo'},
  {ID: 1, LABEL: 'classic'},
  {ID: 3, LABEL: 'abc'}
];

let h={}
data.map(x=&gt; h[x.ID]=x.LABEL );

console.log(h);</code></pre>
</div>
</div>
</p>


<p>I have a set of values in an array where each value has an <code>ID</code> and <code>LABEL</code>.</p>

<p>Once I have the value array and type console <code>value[0]</code> and <code>value[1]</code>, the output is:</p>

<pre><code>value[0] 
Object {ID: 0, LABEL: turbo}

value[1] 
Object {ID: 1, LABEL: classic}
</code></pre>

<p>How can I store these values in a hash map like a key-value (ID-LABEL) pair, and store them in a json?</p>


JavaScript: Convert array of objects into hashmap

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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我在数组中有一组值，其中每个值都有一个ID和LABEL。一旦我有了值数组并输入了console value[0]和value[1]，输出就是：value[0] Object {ID: 0, LABEL: turbo}value[1] Object {ID: 1, LABEL: classic}如何像键值(ID-标签)对...

问JavaScript:将对象数组转换为hashmap
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