数组的长度不同在Internet Explorer尾随逗号 [英] Length of Array Differs In Internet Explorer With Trailing Comma
问题描述
我目前正在使用Javascript是在数组形式的一些数据的工作。该阵列可以包含在最后一个空项，如 [1,2] 。在谷歌Chrome和Firefox，这个例子的长度为2;然而，在IE中，长度为3
I'm currently working with some data using Javascript that is in the form of an array. The array may contain an empty entry at the end, such as [1,2,]. In Google Chrome and Firefox, the length of that example would be 2; however, in IE, the length is 3.
在短期：Internet Explorer被赋予不同的长度在Javascript数组比谷歌Chrome和Firefox。有没有一种办法，以规范在所有浏览器这种行为？
In short: Internet Explorer is giving a different length for an array in Javascript than Google Chrome and Firefox. Is there a way to standardize this behavior across all browsers?
code：
var a = [1,];
alert(a.length);
编辑：
很多答案都在说不要有后面的逗号，但是，这些数据是给我这个样子。
A lot of answers are saying not to have a trailing comma, however, the data is given to me in this way.
推荐答案
浏览器的Javascript怪癖 - array.Length
要处理你的编辑工作原理（在IE8测试中）：
To handle your edit this works (tested in in IE8):
如果（A [则为a.length-1] == NULL）a.length--; //或a.pop（）
有关更安全测试，请看看这个页面上的其他建议：<一href=\"http://stackoverflow.com/questions/6541163/javascript-length-of-array-in-internet-explorer/6541189#6541189\">Javascript:在Internet Explorer 阵列的长度 - DEMO这里
For a safer test, please look at the other suggestion on this page: Javascript: Length of Array in Internet Explorer - DEMO HERE
顺便说一句，从来没有听说过的话省音或的elided~~V - 学习新的东西每天在这里
By the way, never heard the words elision or elided before - learn something new here every day
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