blocks|key|271176|text|只需使用%2B运算符。Javascript使用%2B连接字符串|type|unstyled|depth|inlineStyleRanges|offset|length|style|CODE|entityRanges|data|271177|entityMap^0|4|1|0^^$0|@$1|2|3|4|5|6|7|H|8|@$9|I|A|J|B|C]]|D|@]|E|$]]|$1|F|3|-4|5|6|7|K|8|@]|D|@]|E|$]]]|G|$]]

simply used the <code>+</code> operator. Javascript concats strings with +

blocks|key|274638|text|简单使用text+=+text+%2B+string2|type|unstyled|depth|inlineStyleRanges|entityRanges|data|274639|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|$]]

blocks|key|269157|text|let+text+=+"";
for(let+member+in+list)+{
++text+%2B=+list[member];
}|type|code-block|depth|inlineStyleRanges|entityRanges|data|syntax|javascript|269158|unstyled|entityMap^0|0^^$0|@$1|2|3|4|5|6|7|G|8|@]|9|@]|A|$B|C]]|$1|D|3|-4|5|E|7|H|8|@]|9|@]|A|$]]]|F|$]]

<pre><code>let text = &quot;&quot;;
for(let member in list) {
 text += list[member];
}
</code></pre>

blocks|key|271196|text|听起来你想使用join，例如：|type|unstyled|depth|inlineStyleRanges|offset|length|style|CODE|entityRanges|data|271197|var+text+=+list.join();|code-block|syntax|javascript|271198|entityMap|0|LINK|mutability|MUTABLE|url|https://developer.mozilla.org/en/JavaScript/Reference/Global_Objects/Array/join^0|7|4|7|4|0|0|0^^$0|@$1|2|3|4|5|6|7|S|8|@$9|T|A|U|B|C]]|D|@$9|V|A|W|1|X]]|E|$]]|$1|F|3|G|5|H|7|Y|8|@]|D|@]|E|$I|J]]|$1|K|3|-4|5|6|7|Z|8|@]|D|@]|E|$]]]|L|$M|$5|N|O|P|E|$Q|R]]]]

It sounds like you want to use <a href="https://developer.mozilla.org/en/JavaScript/Reference/Global_Objects/Array/join" rel="noreferrer"><code>join</code></a>, e.g.:

<pre><code>var text = list.join();
</code></pre>

blocks|key|2971542|text|要使用String.concat，您需要替换现有的文本，因为该函数不是通过引用操作的。|type|unstyled|depth|inlineStyleRanges|entityRanges|data|2971543|let+text+=+"";
for+(const+member+in+list)+{
++text+=+text.concat(list[member]);
}|code-block|syntax|javascript|2971544|当然，其他人提供的join()或%2B=建议也可以很好地工作。|2971545|entityMap^0|0|0|0^^$0|@$1|2|3|4|5|6|7|K|8|@]|9|@]|A|$]]|$1|B|3|C|5|D|7|L|8|@]|9|@]|A|$E|F]]|$1|G|3|H|5|6|7|M|8|@]|9|@]|A|$]]|$1|I|3|-4|5|6|7|N|8|@]|9|@]|A|$]]]|J|$]]

To use String.concat, you need to replace your existing text, since the function does not act by reference.
<pre><code>let text = &quot;&quot;;
for (const member in list) {
 text = text.concat(list[member]);
}
</code></pre>
Of course, the join() or += suggestions offered by others will work fine as well.

blocks|key|3185396|text|您还可以继续向现有字符串添加字符串，如下所示：|type|unstyled|depth|inlineStyleRanges|entityRanges|data|3185397|var+myString+=+"Hello+";
myString+%2B=+"World";
myString+%2B=+"!";|code-block|syntax|javascript|3185398|结果将是->+Hello+World!|offset|length|style|CODE|3185399|entityMap^0|0|0|7|C|0^^$0|@$1|2|3|4|5|6|7|O|8|@]|9|@]|A|$]]|$1|B|3|C|5|D|7|P|8|@]|9|@]|A|$E|F]]|$1|G|3|H|5|6|7|Q|8|@$I|R|J|S|K|L]]|9|@]|A|$]]|$1|M|3|-4|5|6|7|T|8|@]|9|@]|A|$]]]|N|$]]

You can also keep adding strings to an existing string like so:

<pre><code>var myString = "Hello ";
myString += "World";
myString += "!";
</code></pre>

the result would be -> <code>Hello World!</code>

blocks|key|3185458|text|您也可以使用string+interpolation|type|unstyled|depth|inlineStyleRanges|entityRanges|offset|length|data|3185459|let+text+=+"";
for(let+member+in+list)+{
++text+=+`${text}${list[member]}`;
}|code-block|syntax|javascript|3185460|entityMap|0|LINK|mutability|MUTABLE|url|https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Template_literals#expression_interpolation^0|6|K|0|0|0^^$0|@$1|2|3|4|5|6|7|Q|8|@]|9|@$A|R|B|S|1|T]]|C|$]]|$1|D|3|E|5|F|7|U|8|@]|9|@]|C|$G|H]]|$1|I|3|-4|5|6|7|V|8|@]|9|@]|C|$]]]|J|$K|$5|L|M|N|C|$O|P]]]]

You can also use <a href="https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Template_literals#expression_interpolation" rel="nofollow noreferrer">string interpolation</a>
<pre><code>let text = &quot;&quot;;
for(let member in list) {
 text = `${text}${list[member]}`;
}
</code></pre>

blocks|key|3185503|text|尝尝这个。它会将相同的字符多次添加到字符串中|type|unstyled|depth|inlineStyleRanges|entityRanges|data|3185504|const+addCharsToString+=+(string,+char,+howManyTimes)+=>+{
++string+%2B+new+Array(howManyTimes).fill(char).join('')
}+|code-block|syntax|javascript|3185505|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|$]]

Try this. It adds the same char multiple times to a string
<pre><code>const addCharsToString = (string, char, howManyTimes) =&gt; {
 string + new Array(howManyTimes).fill(char).join('')
} 
</code></pre>

I need to add in a For Loop characters to an empty string. I know that you can use the function concat in Javascript to do concats with strings
<pre><code>var first_name = &quot;peter&quot;; 
var last_name = &quot;jones&quot;; 
var name=first_name.concat(last_name) 
</code></pre>
But it doesn't work with my example.
Any idea of how to do it in another way?
My code :
<pre><code>var text =&quot;&quot;;
for (var member in list) {
 text.concat(list[member]);
}
</code></pre>

Add characters to a string in Javascript

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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我需要将循环字符的添加到一个空字符串中。我知道您可以在Javascript中使用函数concat来连接字符串var first_name = "peter"; var last_name = "jones"; var name=first_name.concat(last_name) 但它不适用于我的示例。有没有另一种...

问在Javascript中向字符串添加字符
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