blocks|key|1231804|text|将数字转换为字符串，split字符串，并将每个字符转换为数字：|type|unstyled|depth|inlineStyleRanges|offset|length|style|CODE|entityRanges|data|1231805|​|1231806|const+arr+=+String(143)
++.split('')
++.map(Number);
console.log(arr);|code-block|syntax|javascript|1231807|1231808|entityMap^0|A|5|0|0|0|0^^$0|@$1|2|3|4|5|6|7|P|8|@$9|Q|A|R|B|C]]|D|@]|E|$]]|$1|F|3|G|5|6|7|S|8|@]|D|@]|E|$]]|$1|H|3|I|5|J|7|T|8|@]|D|@]|E|$K|L]]|$1|M|3|G|5|6|7|U|8|@]|D|@]|E|$]]|$1|N|3|-4|5|6|7|V|8|@]|D|@]|E|$]]]|O|$]]

<p>Turn the number into a string, <code>split</code> the string, and turn each character into a number:</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 arr = String(143)
  .split('')
  .map(Number);
console.log(arr);</code></pre>
</div>
</div>
</p>


blocks|key|388015|text|您可以使用带有字符串数字的Array.from和Number作为映射函数。|type|unstyled|depth|inlineStyleRanges|offset|length|style|CODE|entityRanges|data|388016|Array.from需要一个可迭代的，并创建一个数组。它接受提供的映射函数，并在使用回调或原始值之后返回一个带有值的新数组。|388017|​|388018|var+number+=+143,
++++array+=+Array.from(number.toString(),+Number);
++++
console.log(array);|code-block|syntax|javascript|388019|388020|entityMap|0|LINK|mutability|MUTABLE|url|https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Array/from|1|https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Number^0|D|A|O|6|D|A|0|O|6|1|0|0|A|0|0|0|0^^$0|@$1|2|3|4|5|6|7|Z|8|@$9|10|A|11|B|C]|$9|12|A|13|B|C]]|D|@$9|14|A|15|1|16]|$9|17|A|18|1|19]]|E|$]]|$1|F|3|G|5|6|7|1A|8|@$9|1B|A|1C|B|C]]|D|@]|E|$]]|$1|H|3|I|5|6|7|1D|8|@]|D|@]|E|$]]|$1|J|3|K|5|L|7|1E|8|@]|D|@]|E|$M|N]]|$1|O|3|I|5|6|7|1F|8|@]|D|@]|E|$]]|$1|P|3|-4|5|6|7|1G|8|@]|D|@]|E|$]]]|Q|$R|$5|S|T|U|E|$V|W]]|X|$5|S|T|U|E|$V|Y]]]]

<p>You could use <a href="https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Array/from" rel="nofollow noreferrer"><code>Array.from</code></a> with the stringed number and <a href="https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Number" rel="nofollow noreferrer"><code>Number</code></a> as mapping function.</p>

<p><code>Array.from</code> takes an iterable and creates an array. It takes a supplied mapping function and returns a new array with values after using the callback or raw values.</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 number = 143,
    array = Array.from(number.toString(), Number);
    
console.log(array);</code></pre>
</div>
</div>
</p>


blocks|key|1231813|text|转换为字符串，然后拆分，然后映射：|type|unstyled|depth|inlineStyleRanges|entityRanges|data|1231814|const+num+=+210;+
const+numArray+=+(""+%2B+num).split("").map(Number)|code-block|syntax|javascript|1231815|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|$]]

<p>Convert to string then split then map:</p>

<pre><code>const num = 210; 
const numArray = ("" + num).split("").map(Number)
</code></pre>


blocks|key|1231899|text|至于Array.from的使用，使用映射将string转换为integer。|type|unstyled|depth|inlineStyleRanges|offset|length|style|CODE|entityRanges|data|1231900|步骤1:通过143将"143"更改为String(143)。|1231901|步骤2:通过"143"将["1",+"4",+"3"]更改为Array.from("143")。|1231902|步骤3:将Number函数作为Array.from中的第二个参数传递，将["1",+"4",+"3"]的结果更改为[1,+4,+3]。哪个'Number‘将用作map+function来迭代每个元素。|1231903|代码示例：|1231904|​|1231905|var+intArray+=+Array.from(String(143),+Number);
console.log(intArray);|code-block|syntax|javascript|1231906|1231907|更新|BOLD|1231908|Array.from已经将映射函数作为其第二个参数。|1231909|entityMap|0|LINK|mutability|MUTABLE|url|https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Array/from^0|2|A|L|6|U|7|0|6|3|A|5|I|B|0|6|5|C|F|U|H|0|5|6|F|A|10|F|1L|9|28|C|0|0|0|0|0|0|2|0|D|4|0|A|0|0^^$0|@$1|2|3|4|5|6|7|18|8|@$9|19|A|1A|B|C]|$9|1B|A|1C|B|C]|$9|1D|A|1E|B|C]]|D|@]|E|$]]|$1|F|3|G|5|6|7|1F|8|@$9|1G|A|1H|B|C]|$9|1I|A|1J|B|C]|$9|1K|A|1L|B|C]]|D|@]|E|$]]|$1|H|3|I|5|6|7|1M|8|@$9|1N|A|1O|B|C]|$9|1P|A|1Q|B|C]|$9|1R|A|1S|B|C]]|D|@]|E|$]]|$1|J|3|K|5|6|7|1T|8|@$9|1U|A|1V|B|C]|$9|1W|A|1X|B|C]|$9|1Y|A|1Z|B|C]|$9|20|A|21|B|C]|$9|22|A|23|B|C]]|D|@]|E|$]]|$1|L|3|M|5|6|7|24|8|@]|D|@]|E|$]]|$1|N|3|O|5|6|7|25|8|@]|D|@]|E|$]]|$1|P|3|Q|5|R|7|26|8|@]|D|@]|E|$S|T]]|$1|U|3|O|5|6|7|27|8|@]|D|@]|E|$]]|$1|V|3|W|5|6|7|28|8|@$9|29|A|2A|B|X]]|D|@]|E|$]]|$1|Y|3|Z|5|6|7|2B|8|@$9|2C|A|2D|B|X]]|D|@$9|2E|A|2F|1|2G]]|E|$]]|$1|10|3|-4|5|6|7|2H|8|@]|D|@]|E|$]]]|11|$12|$5|13|14|15|E|$16|17]]]]

<p>As for <code>Array.from</code> usage, using map to cast from <code>string</code> to <code>integer</code>.</p>

<p>Step 1: change <code>143</code> to <code>"143"</code> by <code>String(143)</code>.</p>

<p>Step 2: change <code>"143"</code> to <code>["1", "4", "3"]</code> by <code>Array.from("143")</code>.</p>

<p>Step 3: while pass <code>Number</code> function as second parameter in <code>Array.from</code>, will change the result of <code>["1", "4", "3"]</code> to <code>[1, 4, 3]</code> . Which 'Number' will be used as <code>map function</code> to iterate every element with it.</p>

<p>Code example:</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 intArray = Array.from(String(143), Number);
console.log(intArray);</code></pre>
</div>
</div>
</p>

<p><strong>Update</strong></p>

<p><a href="https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Array/from" rel="nofollow noreferrer">Array.from</a> already has <strong>map function</strong> as its second parameter.</p>


blocks|key|1231826|text|将数字转换为字符串，split字符串然后使用地图将数组的每个元素转换为数字|type|unstyled|depth|inlineStyleRanges|offset|length|style|CODE|entityRanges|data|1231827|​|1231828|var+num+=+143;
var+splitedNum+=+num.toString().split('').map(Number);
console.log(splitedNum)|code-block|syntax|javascript|1231829|1231830|entityMap|0|LINK|mutability|MUTABLE|url|https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/String/split|1|https://developer.mozilla.org/en/docs/Web/JavaScript/Reference/Global_Objects/Array/map^0|A|5|A|5|0|M|2|1|0|0|0|0^^$0|@$1|2|3|4|5|6|7|X|8|@$9|Y|A|Z|B|C]]|D|@$9|10|A|11|1|12]|$9|13|A|14|1|15]]|E|$]]|$1|F|3|G|5|6|7|16|8|@]|D|@]|E|$]]|$1|H|3|I|5|J|7|17|8|@]|D|@]|E|$K|L]]|$1|M|3|G|5|6|7|18|8|@]|D|@]|E|$]]|$1|N|3|-4|5|6|7|19|8|@]|D|@]|E|$]]]|O|$P|$5|Q|R|S|E|$T|U]]|V|$5|Q|R|S|E|$T|W]]]]

<p>Convert the number to string, <a href="https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/String/split" rel="nofollow noreferrer"><code>split</code></a> the string then convert each element of the array to Number using <a href="https://developer.mozilla.org/en/docs/Web/JavaScript/Reference/Global_Objects/Array/map" rel="nofollow noreferrer">map</a>:</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 num = 143;
var splitedNum = num.toString().split('').map(Number);
console.log(splitedNum)</code></pre>
</div>
</div>
</p>


blocks|key|6489|text|尝尝这个|type|unstyled|depth|inlineStyleRanges|entityRanges|data|6490|​|6491|var+n+=+143;
var+arr+=+n.toString(10).replace(/\D/g,+'0').split('').map(Number);
console.log(arr)|code-block|syntax|javascript|6492|6493|entityMap^0|0|0|0|0^^$0|@$1|2|3|4|5|6|7|L|8|@]|9|@]|A|$]]|$1|B|3|C|5|6|7|M|8|@]|9|@]|A|$]]|$1|D|3|E|5|F|7|N|8|@]|9|@]|A|$G|H]]|$1|I|3|C|5|6|7|O|8|@]|9|@]|A|$]]|$1|J|3|-4|5|6|7|P|8|@]|9|@]|A|$]]]|K|$]]

<p>Try this </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 n = 143;
var arr = n.toString(10).replace(/\D/g, '0').split('').map(Number);
console.log(arr)</code></pre>
</div>
</div>
</p>


<p>What is the shortest way of creating an array consisting of digits from a number?</p>

<p>I don't want to revert to declaring an empty array and then iterating over the number via the <code>for(a,b,c)</code> loop.</p>

<p>I would like something more declarative. Ideally, something like:</p>

<pre><code>Array.from(143) // =&gt; [1, 4, 3]
</code></pre>


Array from integer: 143 -> [1, 4, 3]

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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从一个数字中创建一个由数字组成的数组的最短方法是什么？我不想恢复到声明一个空数组，然后通过for(a,b,c)循环迭代这个数字。我想要一些更说明性的东西。理想的情况是：Array.from(143) // => [1, 4, 3]

问数组从整数: 143 -> [1，4，3]
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回答 6

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问数组从整数: 143 -> [1，4，3]EN

回答 6

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问数组从整数: 143 -> [1，4，3]
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