blocks|key|1212750|text|您可能会这样使用您的示例|type|unstyled|depth|inlineStyleRanges|entityRanges|data|1212751|var+newText+=+""+%2B+$("p").text().split("+").join("+")+%2B+"";|code-block|syntax|javascript|1212752|这将在段落中的所有单词周围放置span标签，将|1212753|Test+is+a+demo.|1212754|转到|1212755|Test+is+a+demo.|1212756|我不知道这会有什么实际用途。|1212757|entityMap^0|0|0|0|0|0|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]]|$1|G|3|H|5|6|7|U|8|@]|9|@]|A|$]]|$1|I|3|J|5|D|7|V|8|@]|9|@]|A|$E|F]]|$1|K|3|L|5|6|7|W|8|@]|9|@]|A|$]]|$1|M|3|N|5|D|7|X|8|@]|9|@]|A|$E|F]]|$1|O|3|P|5|6|7|Y|8|@]|9|@]|A|$]]|$1|Q|3|-4|5|6|7|Z|8|@]|9|@]|A|$]]]|R|$]]

You would probably use your example like this

<pre><code>var newText = "&lt;span&gt;" + $("p").text().split(" ").join("&lt;/span&gt; &lt;span&gt;") + "&lt;/span&gt;";
</code></pre>

This will put span tags around all the words in you paragraphs, turning

<pre><code>&lt;p&gt;Test is a demo.&lt;/p&gt;
</code></pre>

into

<pre><code>&lt;p&gt;&lt;span&gt;Test&lt;/span&gt; &lt;span&gt;is&lt;/span&gt; &lt;span&gt;a&lt;/span&gt; &lt;span&gt;demo.&lt;/span&gt;&lt;/p&gt;
</code></pre>

I do not know what the practical use of this could be.

blocks|key|1427597|text|这不是jQuery函数--它是常规的Array.join函数。|type|unstyled|depth|inlineStyleRanges|entityRanges|offset|length|data|1427598|它将数组转换为字符串，将参数放在每个元素之间。|1427599|entityMap|0|LINK|mutability|MUTABLE|url|https://developer.mozilla.org/en/Core_JavaScript_1.5_Reference/Global_Objects/Array/join^0|I|A|0|0|0^^$0|@$1|2|3|4|5|6|7|N|8|@]|9|@$A|O|B|P|1|Q]]|C|$]]|$1|D|3|E|5|6|7|R|8|@]|9|@]|C|$]]|$1|F|3|-4|5|6|7|S|8|@]|9|@]|C|$]]]|G|$H|$5|I|J|K|C|$L|M]]]]

That's not a jQuery function - it's the regular <a href="https://developer.mozilla.org/en/Core_JavaScript_1.5_Reference/Global_Objects/Array/join" rel="noreferrer">Array.join</a> function.

It converts an array to a string, putting the argument between each element.

blocks|key|1427667|text|使用jQuery示例的实际示例可能是|type|unstyled|depth|inlineStyleRanges|entityRanges|data|1427668|+var+today+=+new+Date();
+$('#'%2B[today.getMonth()%2B1,+today.getDate(),+today.getFullYear()].join("_")).whatever();|code-block|syntax|javascript|1427669|我在我正在使用的日历工具中这样做，这样在页面加载时，我可以对今天的日期做某些事情。|1427670|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|$]]

A practical example using a jQuery example might be 

<pre><code> var today = new Date();
 $('#'+[today.getMonth()+1, today.getDate(), today.getFullYear()].join("_")).whatever();
</code></pre>

I do that in a calendar tool that I am using, this way on the page load, I can do certain things with today's date.

blocks|key|1212837|text|这个结构的实际用法是什么？它是字符串上的javascript+replaceAll()。|type|unstyled|depth|inlineStyleRanges|entityRanges|data|1212838|var+s+=+'stackoverflow_is_cool';++
s+=+s.split('_').join('+');++
console.log(s);|code-block|syntax|javascript|1212839|将输出：|1212840|stackoverflow+is+cool|1212841|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|$]]

The practical use of this construct? It is a javascript replaceAll() on strings.

<pre><code>var s = 'stackoverflow_is_cool'; 
s = s.split('_').join(' '); 
console.log(s);
</code></pre>

will output:

<pre><code>stackoverflow is cool
</code></pre>

blocks|key|1212873|text|join不是javascript函数的jQuery函数。|type|unstyled|depth|inlineStyleRanges|entityRanges|data|1212874|string.The+()方法将数组的元素连接到一个字符串中，并返回将由指定分隔符分隔的连接元素。默认分隔符是逗号(，)。|1212875|http://www.w3schools.com/jsref/jsref_join.asp|offset|length|1212876|entityMap|0|LINK|mutability|MUTABLE|url^0|0|0|0|19|0|0^^$0|@$1|2|3|4|5|6|7|O|8|@]|9|@]|A|$]]|$1|B|3|C|5|6|7|P|8|@]|9|@]|A|$]]|$1|D|3|E|5|6|7|Q|8|@]|9|@$F|R|G|S|1|T]]|A|$]]|$1|H|3|-4|5|6|7|U|8|@]|9|@]|A|$]]]|I|$J|$5|K|L|M|A|$N|E]]]]

join is not a jQuery function .Its a javascript function.

The join() method joins the elements of an array into a string, and returns the string.The elements will be separated by a specified separator. The default separator is comma (,).

<a href="http://www.w3schools.com/jsref/jsref_join.asp" rel="noreferrer">http://www.w3schools.com/jsref/jsref_join.asp</a>

What is Join() in jquery? for example:

<pre><code>var newText = $("p").text().split(" ").join("&lt;/span&gt; &lt;span&gt;"); 
</code></pre>

What is Join() in jQuery?

jQuery

jquery中的Join()是什么？例如：var newText = $("p").text().split(" ").join(" ");

问jQuery中的Join()是什么？
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