blocks|key|3096312|text|它不工作是因为Number对象没有.replace函数。|type|unstyled|depth|inlineStyleRanges|offset|length|style|CODE|entityRanges|data|3096313|使用seconds+=+seconds.toString().replace(/\.[0-9]*/,+'');|3096314|entityMap^0|H|8|0|2|1H|0^^$0|@$1|2|3|4|5|6|7|J|8|@$9|K|A|L|B|C]]|D|@]|E|$]]|$1|F|3|G|5|6|7|M|8|@$9|N|A|O|B|C]]|D|@]|E|$]]|$1|H|3|-4|5|6|7|P|8|@]|D|@]|E|$]]]|I|$]]

It's not working because the Number object doesn't have a <code>.replace</code> function.

Use <code>seconds = seconds.toString().replace(/\.[0-9]*/, '');</code>

blocks|key|3096468|text|如果您的变量是一个数字，并且您实际上只想提取整数部分，那么您将需要使用Math.floor或Math.ceil|type|unstyled|depth|inlineStyleRanges|offset|length|style|CODE|entityRanges|data|3096469|var+int_part+=+seconds+>+0+?+Math.floor(seconds)+:+Math.ceil(seconds);|code-block|syntax|javascript|3096470|entityMap|0|LINK|mutability|MUTABLE|url|https://developer.mozilla.org/en/JavaScript/Reference/Global_Objects/Math/floor|1|https://developer.mozilla.org/en/JavaScript/Reference/Global_Objects/Math/ceil^0|Z|A|1A|9|Z|A|0|1A|9|1|0|0^^$0|@$1|2|3|4|5|6|7|U|8|@$9|V|A|W|B|C]|$9|X|A|Y|B|C]]|D|@$9|Z|A|10|1|11]|$9|12|A|13|1|14]]|E|$]]|$1|F|3|G|5|H|7|15|8|@]|D|@]|E|$I|J]]|$1|K|3|-4|5|6|7|16|8|@]|D|@]|E|$]]]|L|$M|$5|N|O|P|E|$Q|R]]|S|$5|N|O|P|E|$Q|T]]]]

If your variable is a number and you're really trying to extract just the integer part, then you'll want to use <a href="https://developer.mozilla.org/en/JavaScript/Reference/Global_Objects/Math/floor" rel="nofollow"><code>Math.floor</code></a> or <a href="https://developer.mozilla.org/en/JavaScript/Reference/Global_Objects/Math/ceil" rel="nofollow"><code>Math.ceil</code></a>:

<pre><code>var int_part = seconds &gt; 0 ? Math.floor(seconds) : Math.ceil(seconds);
</code></pre>

blocks|key|4882944|text|不能在Number%25s上调用String+methods+(特别是replace)。请先尝试将Number转换为String：|type|unstyled|depth|inlineStyleRanges|offset|length|style|CODE|entityRanges|data|4882945|seconds+=+(seconds+%2B+"").replace(/\.[0-9]*/,+'');|code-block|syntax|javascript|4882946|entityMap|0|LINK|mutability|MUTABLE|url|https://developer.mozilla.org/en/JavaScript/Reference/Global_Objects/Number|1|https://developer.mozilla.org/en/JavaScript/Reference/Global_Objects/String|2|https://developer.mozilla.org/en/JavaScript/Reference/Global_Objects/String#Methods_2|3|https://developer.mozilla.org/en/JavaScript/Reference/Global_Objects/String/replace^0|3|6|E|6|X|7|1B|6|1K|6|3|6|0|E|6|1|L|7|2|X|7|3|0|0^^$0|@$1|2|3|4|5|6|7|Y|8|@$9|Z|A|10|B|C]|$9|11|A|12|B|C]|$9|13|A|14|B|C]|$9|15|A|16|B|C]|$9|17|A|18|B|C]]|D|@$9|19|A|1A|1|1B]|$9|1C|A|1D|1|1E]|$9|1F|A|1G|1|1H]|$9|1I|A|1J|1|1K]]|E|$]]|$1|F|3|G|5|H|7|1L|8|@]|D|@]|E|$I|J]]|$1|K|3|-4|5|6|7|1M|8|@]|D|@]|E|$]]]|L|$M|$5|N|O|P|E|$Q|R]]|S|$5|N|O|P|E|$Q|T]]|U|$5|N|O|P|E|$Q|V]]|W|$5|N|O|P|E|$Q|X]]]]

You can't call <a href="https://developer.mozilla.org/en/JavaScript/Reference/Global_Objects/String" rel="nofollow"><code>String</code></a> <a href="https://developer.mozilla.org/en/JavaScript/Reference/Global_Objects/String#Methods_2" rel="nofollow">methods</a> (specifically, <a href="https://developer.mozilla.org/en/JavaScript/Reference/Global_Objects/String/replace" rel="nofollow"><code>replace</code></a>) on <a href="https://developer.mozilla.org/en/JavaScript/Reference/Global_Objects/Number" rel="nofollow"><code>Number</code></a>s. Try converting the <code>Number</code> to a <code>String</code> first:

<pre><code>seconds = (seconds + "").replace(/\.[0-9]*/, '');
</code></pre>

blocks|key|3096427|text|如果你只是想从数字中去掉小数，这不是一个好的正则表达式的用法。|type|unstyled|depth|inlineStyleRanges|entityRanges|data|3096428|使用parseInt()，例如：|offset|length|3096429|parseInt(seconds,+10);|code-block|syntax|javascript|3096430|让它做同样的事情--+http://jsfiddle.net/bzAGe/|3096431|entityMap|0|LINK|mutability|MUTABLE|url|https://developer.mozilla.org/en/JavaScript/Reference/Global_Objects/parseInt|1|http://jsfiddle.net/bzAGe/^0|0|2|A|0|0|0|B|Q|1|0^^$0|@$1|2|3|4|5|6|7|W|8|@]|9|@]|A|$]]|$1|B|3|C|5|6|7|X|8|@]|9|@$D|Y|E|Z|1|10]]|A|$]]|$1|F|3|G|5|H|7|11|8|@]|9|@]|A|$I|J]]|$1|K|3|L|5|6|7|12|8|@]|9|@$D|13|E|14|1|15]]|A|$]]|$1|M|3|-4|5|6|7|16|8|@]|9|@]|A|$]]]|N|$O|$5|P|Q|R|A|$S|T]]|U|$5|P|Q|R|A|$S|V]]]]

If you are merely trying to drop the decimals from a number, this is not a good use of regular expressions.

Use <a href="https://developer.mozilla.org/en/JavaScript/Reference/Global_Objects/parseInt" rel="nofollow">parseInt()</a>, like:

<pre><code>parseInt(seconds, 10);
</code></pre>

See that it does the same thing - <a href="http://jsfiddle.net/bzAGe/" rel="nofollow">http://jsfiddle.net/bzAGe/</a>

blocks|key|1195175|text|首先将其强制为字符串：|type|unstyled|depth|inlineStyleRanges|entityRanges|data|1195176|$(function()+{

++++var+seconds+=+""+%2B+142.097019375;

++++seconds+=+seconds.replace(/\.[0-9]*/,+'');

++++alert(seconds);+

});|code-block|syntax|javascript|1195177|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|$]]

Force it to a string first:

<pre><code>$(function() {

 var seconds = "" + 142.097019375;

 seconds = seconds.replace(/\.[0-9]*/, '');

 alert(seconds); 

});
</code></pre>

blocks|key|3096382|text|您想要获得这个var？的整数部分。你可能还想知道其他的方法，look+a+Math+object+reference。|type|unstyled|depth|inlineStyleRanges|entityRanges|offset|length|data|3096383|定义和用法|style|BOLD|3096384|3096385|+floor()方法将一个数字向下舍入到最接近的整数，并返回结果。|blockquote|3096386|3096387|3096388|语法|3096389|Math.floor(x)

Parameter+++++Description
x+++++++++++++Required.+A+number|code-block|syntax|javascript|3096390|3096391|使用正则表达式|3096392|replace是一种String方法，您可以在执行替换之前将其转换为字符串|CODE|3096393|(seconds.toString()).replace()|3096394|或将秒声明为字符串|3096395|var+seconds+=+"value";|3096396|Javascript+String+object|3096397|3096398|replace()搜索子字符串(或正则表达式)与字符串之间的匹配项，并将匹配的子字符串替换为新子字符串|unordered-list-item|3096399|3096400|3096401|string.replace(regexp/substr,newstring)

Parameter+++++++++Description
regexp/substr+++++Required.+A+substring+or+a+regular+expression.
newstring+++++++++Required.+The+string+to+replace+the+found+value+in+parameter+1|3096402|entityMap|0|LINK|mutability|MUTABLE|url|http://www.w3schools.com/jsref/jsref_obj_math.asp|1|http://www.w3schools.com/jsref/jsref_obj_string.asp|2|http://replace%2528%2529%2520%2509Searches%2520for%2520a%2520match%2520between%2520a%2520substring%2520%2528or%2520regular%2520expression%2529%2520and%2520a%2520string,%2520and%2520replaces%2520the%2520matched%2520substring%2520with%2520a%2520new%2520substring^0|U|S|0|0|0|5|0|0|0|0|0|0|2|0|0|0|0|0|7|A|6|0|0|0|0|0|O|1|0|0|0|9|2|0|0|0|2|0|0^^$0|@$1|2|3|4|5|6|7|1S|8|@]|9|@$A|1T|B|1U|1|1V]]|C|$]]|$1|D|3|E|5|6|7|1W|8|@$A|1X|B|1Y|F|G]]|9|@]|C|$]]|$1|H|3|-4|5|6|7|1Z|8|@]|9|@]|C|$]]|$1|I|3|J|5|K|7|20|8|@]|9|@]|C|$]]|$1|L|3|-4|5|6|7|21|8|@]|9|@]|C|$]]|$1|M|3|-4|5|6|7|22|8|@]|9|@]|C|$]]|$1|N|3|O|5|6|7|23|8|@$A|24|B|25|F|G]]|9|@]|C|$]]|$1|P|3|Q|5|R|7|26|8|@]|9|@]|C|$S|T]]|$1|U|3|-4|5|6|7|27|8|@]|9|@]|C|$]]|$1|V|3|W|5|6|7|28|8|@]|9|@]|C|$]]|$1|X|3|Y|5|6|7|29|8|@$A|2A|B|2B|F|Z]|$A|2C|B|2D|F|Z]]|9|@]|C|$]]|$1|10|3|11|5|R|7|2E|8|@]|9|@]|C|$S|T]]|$1|12|3|13|5|6|7|2F|8|@]|9|@]|C|$]]|$1|14|3|15|5|R|7|2G|8|@]|9|@]|C|$S|T]]|$1|16|3|17|5|6|7|2H|8|@]|9|@$A|2I|B|2J|1|2K]]|C|$]]|$1|18|3|-4|5|6|7|2L|8|@]|9|@]|C|$]]|$1|19|3|1A|5|1B|7|2M|8|@]|9|@$A|2N|B|2O|1|2P]]|C|$]]|$1|1C|3|-4|5|6|7|2Q|8|@]|9|@]|C|$]]|$1|1D|3|O|5|6|7|2R|8|@$A|2S|B|2T|F|G]]|9|@]|C|$]]|$1|1E|3|1F|5|R|7|2U|8|@]|9|@]|C|$S|T]]|$1|1G|3|-4|5|6|7|2V|8|@]|9|@]|C|$]]]|1H|$1I|$5|1J|1K|1L|C|$1M|1N]]|1O|$5|1J|1K|1L|C|$1M|1P]]|1Q|$5|1J|1K|1L|C|$1M|1R]]]]

You want to get the integer part of this var? <a href="http://www.w3schools.com/jsref/jsref_floor.asp" rel="nofollow noreferrer">Use Math.floor</a>. There are other method that you might want to know, <a href="http://www.w3schools.com/jsref/jsref_obj_math.asp" rel="nofollow noreferrer">look a Math object reference</a>.
Definition and Usage
<blockquote>
The floor() method rounds a number DOWNWARDS to the nearest integer, and returns the result.
</blockquote>
Syntax
<pre><code>Math.floor(x)

Parameter Description
x Required. A number
</code></pre>
<hr />
<h3>Using regex</h3>
<code>replace</code> is a <code>String</code> method, you can convert it to a string before performing the replace
<pre><code>(seconds.toString()).replace()
</code></pre>
or declare seconds as a string
<pre><code>var seconds = &quot;value&quot;;
</code></pre>
<a href="http://www.w3schools.com/jsref/jsref_obj_string.asp" rel="nofollow noreferrer">Javascript String object</a>
<ul>
<li><a href="http://replace%28%29%20%09Searches%20for%20a%20match%20between%20a%20substring%20%28or%20regular%20expression%29%20and%20a%20string,%20and%20replaces%20the%20matched%20substring%20with%20a%20new%20substring" rel="nofollow noreferrer">replace()</a> Searches for a match between a substring (or regular expression) and a string, and replaces the matched substring with a new substring</li>
</ul>
Syntax
<pre><code>string.replace(regexp/substr,newstring)

Parameter Description
regexp/substr Required. A substring or a regular expression.
newstring Required. The string to replace the found value in parameter 1
</code></pre>

Say I have this for example:

<pre><code>$(function() {

 var seconds = 142.097019375;

 seconds = seconds.replace(/\.[0-9]*/, '');

 alert(seconds); 

});
</code></pre>

This wont work, but if seconds was <code>$('.seconds').html();</code> it would replace it, is there anyway to perform a regex on a jquery variable as such.

using a regular expression on a variable?

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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假设我有这样的例子：$(function() {    var seconds = 142.097019375;    seconds = seconds.replace(/\.[0-9]*/, '');    alert(seconds); });这是行不通的，但是如果seconds是$('.seconds').html();，它就会替换它，有没有在jquery变量上执行正则表达式的方法。

问在变量上使用正则表达式？
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问在变量上使用正则表达式？EN

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问在变量上使用正则表达式？
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