blocks|key|1119426|text|要删除要使用的第一个字符：|type|unstyled|depth|inlineStyleRanges|entityRanges|data|1119427|var+myOriginalString+=+",'first+string','more','even+more'";+
var+myString+=+myOriginalString.substring(1);|code-block|syntax|javascript|1119428|我不确定这会不会是你想要的结果，因为你仍然需要拆分它来创建一个数组。可能是这样的：|1119429|var+myString+=+myOriginalString.substring(1);
var+myArray+=+myString.split(',');|1119430|请记住，‘字符将是此处拆分中每个字符串的一部分。|1119431|entityMap^0|0|0|0|0|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]]|$1|G|3|H|5|6|7|Q|8|@]|9|@]|A|$]]|$1|I|3|J|5|D|7|R|8|@]|9|@]|A|$E|F]]|$1|K|3|L|5|6|7|S|8|@]|9|@]|A|$]]|$1|M|3|-4|5|6|7|T|8|@]|9|@]|A|$]]]|N|$]]

To remove the first character you would use:

<pre><code>var myOriginalString = ",'first string','more','even more'"; 
var myString = myOriginalString.substring(1);
</code></pre>

I'm not sure this will be the result you're looking for though because you will still need to split it to create an array with it. Maybe something like:

<pre><code>var myString = myOriginalString.substring(1);
var myArray = myString.split(',');
</code></pre>

Keep in mind, the ' character will be a part of each string in the split here.

blocks|key|904743|text|在这种特定情况下(开头总是有一个您想要删除的字符)，您需要：|type|unstyled|depth|inlineStyleRanges|entityRanges|data|904744|str.substring(1)|code-block|syntax|javascript|904745|但是，如果您希望能够检测逗号是否存在并在逗号存在时将其删除，则执行类似以下操作：|904746|if+(str[0]+==+',')+{+
++str+=+str.substring(1);
}|904747|entityMap^0|0|0|0|0^^$0|@$1|2|3|4|5|6|7|M|8|@]|9|@]|A|$]]|$1|B|3|C|5|D|7|N|8|@]|9|@]|A|$E|F]]|$1|G|3|H|5|6|7|O|8|@]|9|@]|A|$]]|$1|I|3|J|5|D|7|P|8|@]|9|@]|A|$E|F]]|$1|K|3|-4|5|6|7|Q|8|@]|9|@]|A|$]]]|L|$]]

In this specific case (there is always a single character at the start you want to remove) you'll want:

<pre><code>str.substring(1)
</code></pre>

However, if you want to be able to detect if the comma is there and remove it if it is, then something like:

<pre><code>if (str[0] == ',') { 
 str = str.substring(1);
}
</code></pre>

blocks|key|905021|text|一句话|type|unstyled|depth|inlineStyleRanges|entityRanges|data|905022|str+=+str.replace(/%5E,/,+'');|code-block|syntax|javascript|905023|我还会来的。|905024|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|$]]

One-liner 

<pre><code>str = str.replace(/^,/, '');
</code></pre>

I'll be back.

blocks|key|904695|text|var+s+=+",'first+string','more','even+more'";

var+array+=+s.split(',').slice(1);|type|code-block|depth|inlineStyleRanges|entityRanges|data|syntax|javascript|904696|这是假设您开始的字符串实际上是一个字符串，而不是字符串数组。|unstyled|904697|entityMap^0|0|0^^$0|@$1|2|3|4|5|6|7|I|8|@]|9|@]|A|$B|C]]|$1|D|3|E|5|F|7|J|8|@]|9|@]|A|$]]|$1|G|3|-4|5|F|7|K|8|@]|9|@]|A|$]]]|H|$]]

<pre><code>var s = ",'first string','more','even more'";

var array = s.split(',').slice(1);
</code></pre>

That's assuming the string you begin with is in fact a String, like you said, and not an Array of strings.

blocks|key|904872|text|假设字符串名为myStr：|type|unstyled|depth|inlineStyleRanges|entityRanges|data|904873|//+Strip+start+and+end+quotation+mark+and+possible+initial+comma
myStr=myStr.replace(/%5E,?'/,'').replace(/'$/,'');

//+Split+stripping+quotations
myArray=myStr.split("','");|code-block|syntax|javascript|904874|请注意，如果一个字符串可能在列表中丢失，甚至没有引号，而您希望在数组中的相应位置有一个空位，则需要手动编写拆分以获得健壮的解决方案。|904875|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|$]]

Assuming the string is called myStr:

<pre><code>// Strip start and end quotation mark and possible initial comma
myStr=myStr.replace(/^,?'/,'').replace(/'$/,'');

// Split stripping quotations
myArray=myStr.split("','");
</code></pre>

Note that if a string can be missing in the list without even having its quotation marks present and you want an empty spot in the corresponding location in the array, you'll need to write the splitting manually for a robust solution.

blocks|key|904925|text|var+s+=+",'first+string','more','even+more'";++
s.split(/'?,'?/).filter(function(v)+{+return+v;+});|type|code-block|depth|inlineStyleRanges|entityRanges|data|syntax|javascript|904926|结果如下：|unstyled|904927|["first+string",+"more",+"even+more'"]|904928|首先用逗号拆分，可能用单引号括起来，|904929|然后过滤掉不真实的(空的)部分。|904930|entityMap^0|0|0|0|0|0^^$0|@$1|2|3|4|5|6|7|O|8|@]|9|@]|A|$B|C]]|$1|D|3|E|5|F|7|P|8|@]|9|@]|A|$]]|$1|G|3|H|5|6|7|Q|8|@]|9|@]|A|$B|C]]|$1|I|3|J|5|F|7|R|8|@]|9|@]|A|$]]|$1|K|3|L|5|F|7|S|8|@]|9|@]|A|$]]|$1|M|3|-4|5|F|7|T|8|@]|9|@]|A|$]]]|N|$]]

<pre><code>var s = ",'first string','more','even more'"; 
s.split(/'?,'?/).filter(function(v) { return v; });
</code></pre>

Results in: 

<pre><code>["first string", "more", "even more'"]
</code></pre>

First split with commas possibly surrounded by single quotes, 
then filter the non-truthy (empty) parts out.

blocks|key|904770|text|要将字符串转换为数组，我通常使用split()|type|unstyled|depth|inlineStyleRanges|offset|length|style|CODE|entityRanges|data|904771|>+var+s+=+",'first+string','more','even+more'"
>+s.split("','")
[",'first+string",+"more",+"even+more'"]|code-block|syntax|javascript|904772|这几乎就是您想要的。现在你只需要去掉前两个字符和最后一个字符：|904773|>+s.slice(2,+s.length-1)
"first+string','more','even+more"

>+s.slice(2,+s.length-2).split("','");
["first+string",+"more",+"even+more"]|904774|为了从字符串中提取一个子字符串，我通常使用slice()，但是substr()和substring()也可以完成这项工作。|904775|entityMap|0|LINK|mutability|MUTABLE|url|https://developer.mozilla.org/en/JavaScript/Reference/Global_Objects/String/slice|1|https://developer.mozilla.org/en/JavaScript/Reference/Global_Objects/String/substr|2|https://developer.mozilla.org/en/JavaScript/Reference/Global_Objects/String/substring^0|G|7|0|0|0|0|L|7|V|8|14|B|L|7|0|V|8|1|14|B|2|0^^$0|@$1|2|3|4|5|6|7|12|8|@$9|13|A|14|B|C]]|D|@]|E|$]]|$1|F|3|G|5|H|7|15|8|@]|D|@]|E|$I|J]]|$1|K|3|L|5|6|7|16|8|@]|D|@]|E|$]]|$1|M|3|N|5|H|7|17|8|@]|D|@]|E|$I|J]]|$1|O|3|P|5|6|7|18|8|@$9|19|A|1A|B|C]|$9|1B|A|1C|B|C]|$9|1D|A|1E|B|C]]|D|@$9|1F|A|1G|1|1H]|$9|1I|A|1J|1|1K]|$9|1L|A|1M|1|1N]]|E|$]]|$1|Q|3|-4|5|6|7|1O|8|@]|D|@]|E|$]]]|R|$S|$5|T|U|V|E|$W|X]]|Y|$5|T|U|V|E|$W|Z]]|10|$5|T|U|V|E|$W|11]]]]

To turn a string into an array I usually use <code>split()</code>

<pre><code>&gt; var s = ",'first string','more','even more'"
&gt; s.split("','")
[",'first string", "more", "even more'"]
</code></pre>

This is almost what you want. Now you just have to strip the first two and the last character:

<pre><code>&gt; s.slice(2, s.length-1)
"first string','more','even more"

&gt; s.slice(2, s.length-2).split("','");
["first string", "more", "even more"]
</code></pre>

To extract a substring from a string I usually use <a href="https://developer.mozilla.org/en/JavaScript/Reference/Global_Objects/String/slice" rel="nofollow"><code>slice()</code></a> but <a href="https://developer.mozilla.org/en/JavaScript/Reference/Global_Objects/String/substr" rel="nofollow"><code>substr()</code></a> and <a href="https://developer.mozilla.org/en/JavaScript/Reference/Global_Objects/String/substring" rel="nofollow"><code>substring()</code></a> also do the job.

blocks|key|1119789|text|s=s.substring(1);|type|code-block|depth|inlineStyleRanges|entityRanges|data|syntax|javascript|1119790|我喜欢让事情变得简单。|unstyled|1119791|entityMap^0|0|0^^$0|@$1|2|3|4|5|6|7|I|8|@]|9|@]|A|$B|C]]|$1|D|3|E|5|F|7|J|8|@]|9|@]|A|$]]|$1|G|3|-4|5|F|7|K|8|@]|9|@]|A|$]]]|H|$]]

<pre><code>s=s.substring(1);
</code></pre>

I like to keep stuff simple.

blocks|key|1119722|text|您可以使用正则表达式直接替换javascript上的函数，或者像php+ltrim(左)和rtrim(右)中那样定义帮助函数：|type|unstyled|depth|inlineStyleRanges|entityRanges|data|1119723|1)替换：|1119724|var+myArray+=+",'first+string','more','even+more'".replace(/%5E\s%2B/,+'').split(/'?,?'/);|code-block|syntax|javascript|1119725|2)帮助功能：|1119726|if+(!String.prototype.ltrim)+String.prototype.ltrim+=+function()+{
++++return+this.replace(/%5E\s%2B/,+'');
};
if+(!String.prototype.rtrim)+String.prototype.rtrim+=+function()+{
++++return+this.replace(/\s%2B$/,+'');
};
var+myArray+=+",'first+string','more','even+more'".ltrim().split(/'?,?'/).filter(function(el)+{return+el.length+!=+0});;|1119727|您可以执行其他操作，将参数添加到help函数中，以替换字符，等等。|1119728|entityMap^0|0|0|0|0|0|0^^$0|@$1|2|3|4|5|6|7|Q|8|@]|9|@]|A|$]]|$1|B|3|C|5|6|7|R|8|@]|9|@]|A|$]]|$1|D|3|E|5|F|7|S|8|@]|9|@]|A|$G|H]]|$1|I|3|J|5|6|7|T|8|@]|9|@]|A|$]]|$1|K|3|L|5|F|7|U|8|@]|9|@]|A|$G|H]]|$1|M|3|N|5|6|7|V|8|@]|9|@]|A|$]]|$1|O|3|-4|5|6|7|W|8|@]|9|@]|A|$]]]|P|$]]

You can use directly replace function on javascript with regex or define a help function as in php ltrim(left) and rtrim(right):

1) With replace:

<pre><code>var myArray = ",'first string','more','even more'".replace(/^\s+/, '').split(/'?,?'/);
</code></pre>

2) Help functions:

<pre><code>if (!String.prototype.ltrim) String.prototype.ltrim = function() {
 return this.replace(/^\s+/, '');
};
if (!String.prototype.rtrim) String.prototype.rtrim = function() {
 return this.replace(/\s+$/, '');
};
var myArray = ",'first string','more','even more'".ltrim().split(/'?,?'/).filter(function(el) {return el.length != 0});;
</code></pre>

You can do and other things to add parameter to the help function with what you want to replace the char, etc.

blocks|key|1119824|text|删除前导字符或尾随字符：|type|unstyled|depth|inlineStyleRanges|entityRanges|data|1119825|function+trimLeadingTrailing(inputStr,+toRemove)+{
++++//+use+a+regex+to+match+toRemove+at+the+start+(%5E)
++++//+and+at+the+end+($)+of+inputStr
++++const+re+=+new+Regex(`/%5E${toRemove}%7C{toRemove}$/`);
++++return+inputStr.replace(re,+'');
}|code-block|syntax|javascript|1119826|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|$]]

remove leading or trailing characters:
<pre><code>function trimLeadingTrailing(inputStr, toRemove) {
 // use a regex to match toRemove at the start (^)
 // and at the end ($) of inputStr
 const re = new Regex(`/^${toRemove}|{toRemove}$/`);
 return inputStr.replace(re, '');
}
</code></pre>

I have the following string:

<pre><code>",'first string','more','even more'"
</code></pre>

I want to transform this into an Array but obviously this is not valid due to the first comma. How can I remove the first comma from my string and make it a valid Array?

I’d like to end up with something like this:

<pre><code>myArray = ['first string','more','even more']
</code></pre>

Remove leading comma from a string

我有以下字符串：",'first string','more','even more'"我想把它转换成一个数组，但显然由于第一个逗号的原因，这是无效的。如何删除字符串中的第一个逗号并使其成为有效的数组？我想以这样的方式结束：myArray  = ['first string','more','even more']

问从字符串中删除前导逗号
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回答 10

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