blocks|key|1359526|text|不如你用：|type|unstyled|depth|inlineStyleRanges|entityRanges|data|1359527|var+myArray+=+[a,,,b,c,d,,,];
var+str+=+myArray.join();|code-block|syntax|javascript|1359528|这将给出数组元素的字符串，保留逗号。|1359529|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|$]]

How about you use : 

<pre><code>var myArray = [a,,,b,c,d,,,];
var str = myArray.join();
</code></pre>

This will give a string of array elements, preserving the commas.

blocks|key|1359613|text|数组的toString()方法基本上是执行一个join(",")，这就是为什么要在字符串中获得额外的逗号。|type|unstyled|depth|inlineStyleRanges|offset|length|style|CODE|entityRanges|data|1359614|相反，如果希望加入元素而不将分隔符作为字符串的一部分添加，则使用join("")。|1359615|​|1359616|var+myArray+=+["a",",","b","c","d",",",]
document.body.innerText+=+myArray.join("");|code-block|syntax|javascript|1359617|1359618|entityMap^0|3|A|N|9|0|W|8|0|0|0|0^^$0|@$1|2|3|4|5|6|7|R|8|@$9|S|A|T|B|C]|$9|U|A|V|B|C]]|D|@]|E|$]]|$1|F|3|G|5|6|7|W|8|@$9|X|A|Y|B|C]]|D|@]|E|$]]|$1|H|3|I|5|6|7|Z|8|@]|D|@]|E|$]]|$1|J|3|K|5|L|7|10|8|@]|D|@]|E|$M|N]]|$1|O|3|I|5|6|7|11|8|@]|D|@]|E|$]]|$1|P|3|-4|5|6|7|12|8|@]|D|@]|E|$]]]|Q|$]]

The Array's <code>toString()</code> method basically does a <code>join(",")</code> which is why you are getting the extra commas in your string.

Instead use <code>join("")</code> if you want to join the elements without the delimiter being added as part of the string

<div class="snippet" data-lang="js" data-hide="false">
<div class="snippet-code">
<pre class="snippet-code-js lang-js prettyprint-override"><code>var myArray = ["a",",","b","c","d",",",]
document.body.innerText = myArray.join("");</code></pre>
</div>
</div>

blocks|key|2117721|text|基本上，您有一个稀疏数组，并希望只提取已填充的值并将其转换为字符串？这里有一个可能不是最好的解决方案：|type|unstyled|depth|inlineStyleRanges|entityRanges|data|2117722|++++var+myArray+=+['a',',',',','b',',','c']
var+resultArray+=+[];
for(var+i+=+0;+i+<+myArray.length;+i%2B%2B){
++++if(myArray[i]+!==+','){//+allow+0,+false,+null+values,+but+not+undefined
+++++++resultArray.push(myArray[i]);
++++}
}

console.log(resultArray);|code-block|syntax|javascript|2117723|工作计划：http://plnkr.co/edit/55T6PGI9DuTlvy6k88hr?p=preview，检查你的溴化物机的控制台。|offset|length|2117724|entityMap|0|LINK|mutability|MUTABLE|url|http://plnkr.co/edit/55T6PGI9DuTlvy6k88hr?p=preview^0|0|0|5|1F|0|0^^$0|@$1|2|3|4|5|6|7|S|8|@]|9|@]|A|$]]|$1|B|3|C|5|D|7|T|8|@]|9|@]|A|$E|F]]|$1|G|3|H|5|6|7|U|8|@]|9|@$I|V|J|W|1|X]]|A|$]]|$1|K|3|-4|5|6|7|Y|8|@]|9|@]|A|$]]]|L|$M|$5|N|O|P|A|$Q|R]]]]

Basically you have a sparse array and want to extract only filled values and convert it to string ? Here is one, probably not the best, solution : 

<pre><code> var myArray = ['a',',',',','b',',','c']
var resultArray = [];
for(var i = 0; i &lt; myArray.length; i++){
 if(myArray[i] !== ','){// allow 0, false, null values, but not undefined
 resultArray.push(myArray[i]);
 }
}

console.log(resultArray);
</code></pre>

Working plnkr : <a href="http://plnkr.co/edit/55T6PGI9DuTlvy6k88hr?p=preview" rel="nofollow">http://plnkr.co/edit/55T6PGI9DuTlvy6k88hr?p=preview</a>, check the console of your broswer.

blocks|key|2117779|text|如果这是一个实际的字符串数组，并且只需要那些具有实际值的字符串，则可以使用filter()函数筛选出任何未定义的字符串：|type|unstyled|depth|inlineStyleRanges|offset|length|style|CODE|entityRanges|data|2117780|//+Your+example+array
var+input+=+['a',,,'b','c','d',,,];
//+Remove+any+undefined+elements
var+output+=+input.filter(function(e){+return+e;+});+//+yields+['a','b','c','d']|code-block|syntax|javascript|2117781|然后可以使用join()函数使用元素创建字符串：|2117782|var+result+=+output.join();+//+yields+"a,b,c,d"|2117783|示例片段|BOLD|2117784|​|2117785|var+input+=+['a',,,'b','c','d',,,];
document.write('INPUT:+'+%2B+input+%2B+'<br+/>');
var+output+=+input.filter(function(e){+return+e;+});
document.write('OUTPUT:+'+%2B+output);|2117786|2117787|entityMap|0|LINK|mutability|MUTABLE|url|https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Array/filter|1|https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Array/join^0|11|8|11|8|0|0|0|6|6|6|6|1|0|0|0|4|0|0|0|0^^$0|@$1|2|3|4|5|6|7|16|8|@$9|17|A|18|B|C]]|D|@$9|19|A|1A|1|1B]]|E|$]]|$1|F|3|G|5|H|7|1C|8|@]|D|@]|E|$I|J]]|$1|K|3|L|5|6|7|1D|8|@$9|1E|A|1F|B|C]]|D|@$9|1G|A|1H|1|1I]]|E|$]]|$1|M|3|N|5|H|7|1J|8|@]|D|@]|E|$I|J]]|$1|O|3|P|5|6|7|1K|8|@$9|1L|A|1M|B|Q]]|D|@]|E|$]]|$1|R|3|S|5|6|7|1N|8|@]|D|@]|E|$]]|$1|T|3|U|5|H|7|1O|8|@]|D|@]|E|$I|J]]|$1|V|3|S|5|6|7|1P|8|@]|D|@]|E|$]]|$1|W|3|-4|5|6|7|1Q|8|@]|D|@]|E|$]]]|X|$Y|$5|Z|10|11|E|$12|13]]|14|$5|Z|10|11|E|$12|15]]]]

If this is an actual array of strings and you wanted only those with actual values, you could use the <a href="https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Array/filter" rel="nofollow"><code>filter()</code></a> function to filter out any non-undefined ones :

<pre><code>// Your example array
var input = ['a',,,'b','c','d',,,];
// Remove any undefined elements
var output = input.filter(function(e){ return e; }); // yields ['a','b','c','d']
</code></pre>

You could then use the <a href="https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Array/join" rel="nofollow"><code>join()</code></a> function to create a string with your elements :

<pre><code>var result = output.join(); // yields "a,b,c,d"
</code></pre>

Example Snippet

<div class="snippet" data-lang="js" data-hide="false">
<div class="snippet-code">
<pre class="snippet-code-js lang-js prettyprint-override"><code>var input = ['a',,,'b','c','d',,,];
document.write('INPUT: ' + input + '&lt;br /&gt;');
var output = input.filter(function(e){ return e; });
document.write('OUTPUT: ' + output);</code></pre>
</div>
</div>

blocks|key|1359559|text|如果希望它维护中心逗号，则应将数组创建为|type|unstyled|depth|inlineStyleRanges|entityRanges|data|1359560|var+myArray+=+[a,",",b,c,d,",",];|code-block|syntax|javascript|1359561|然后，这将把3集合中的中间逗号视为包含该字符的字符串，而不是数组分隔符。|1359562|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|$]]

if you want it to maintain the centre comma you should create your array as

<pre><code>var myArray = [a,",",b,c,d,",",];
</code></pre>

this will then treat the middle comma in the set of 3 as a string containing that character rather than the array seperator

blocks|key|2291360|text|您可以更改正则表达式，将item,item替换为item+item。|type|unstyled|depth|inlineStyleRanges|offset|length|style|CODE|entityRanges|data|2291361|+myArray.toString().replace(/([a-z,]),([a-z,])/g,+"$1$2")|code-block|syntax|javascript|2291362|entityMap^0|C|9|O|9|0|0^^$0|@$1|2|3|4|5|6|7|M|8|@$9|N|A|O|B|C]|$9|P|A|Q|B|C]]|D|@]|E|$]]|$1|F|3|G|5|H|7|R|8|@]|D|@]|E|$I|J]]|$1|K|3|-4|5|6|7|S|8|@]|D|@]|E|$]]]|L|$]]

You could change your regex, to replace <code>item,item</code> for <code>item item</code>.

<pre><code> myArray.toString().replace(/([a-z,]),([a-z,])/g, "$1$2")
</code></pre>

I have an array of character with commas separating them. I need to split an array but retain my comma inbetween each character.

See below for an example array:

<pre><code>var myArray = [a,,,b,c,d,,,]
</code></pre>

There's a comma in there between the characters "a" and "b". I need to retain the comma when converting the array to a string.

The output string needs to resemble this:

<code>a,bcd,</code>

This is what i'm currently doing to retain the commas:

<pre><code>myArray.toString().replace(/,/g, "");
</code></pre>

Allowing commas to follow through when converting array to string

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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我有一系列字符，用逗号隔开它们。我需要拆分一个数组，但在每个字符之间保留逗号。有关示例数组，请参见下面的内容：var myArray = [a,,,b,c,d,,,]在字符"a“和"b”之间有一个逗号。在将数组转换为字符串时，我需要保留逗号。输出字符串需要如下所示：a,bcd,这就是我目前为保留逗号所做的工作：myArray.toString().replace(/,/g, "");

问允许逗号在将数组转换为字符串时遵循
EN

回答 6

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问允许逗号在将数组转换为字符串时遵循EN

回答 6

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问允许逗号在将数组转换为字符串时遵循
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