在Javascript中拆分字符串的奇怪行为 [英] Strange behaviour with spliting a string in Javascript
问题描述
我正在尝试做一些相对简单的事情。我有这种格式的日期dd / MM / yyyy例如：
I am trying to do something relatively simple. I have a date in this format dd/MM/yyyy eg:
var newDate = "11/06/2015";
我想将其转换为日期。
此代码仅适用于Chrome和Firefox：
This code only works in Chrome and Firefox:
new Date(newDate)
在IE11中，我得到 Nan
In IE11 I get Nan
所以我想这样做：
var parts = newDate.split("/");
var year = parts[2].trim();
var month = parts[1].trim();
var day = parts[0].trim();
var dt = new Date(Number(year), Number(month) - 1, Number(day));
哪个应该有效，但我遇到了一个非常奇怪的错误。
Which should work, but I have encountered a very strange bug.
如果您尝试此代码：
function myFunction() {
var newDate = "11/06/2015";
var parts = newDate.split('/');
var year = parts[2].trim();
var a = year;
var b = Number(year);
var c = parseInt(year, 10);
var d = parts;
var n = a + "<br>" + b + "<br>" + c + "<br>" + d;
document.getElementById("demo").innerHTML = n;
}
<p>Click the button to see the parse error.</p>
<button onclick="myFunction()">Try it</button>
<p id="demo"></p>
然后在IE中它添加了一个神秘的角色，它打印出 2015年并在chrome中打印出？2015 。
Then in IE it adds a mystery character and it prints out ý2015 and in chrome it prints out ?2015.
事实上IE中部件的价值是：ý11ý，ý06ý，ý2015
在Chrome中：？11？，？06 ？，？2015
In fact the value of parts in IE is : ý11ý,ý06ý,ý2015
In Chrome: ?11?,?06?,?2015
我无法理解这些神秘人物的来源！我的原始字符串只是2015年11月06日
I can't understand where these mystery characters come from! My original string is just "11/06/2015"
似乎没有做一些简单的事情的方法，比如从一个简单的字符串中解析一个整数。
There seems to be no way for be to do something so simple, such as parsing an integer from a simple string.
小提琴不显示隐藏的字符，但我相信它们仍然存在，因为数字（2015）导致 NaN 你可以清楚地看到这里
有什么想法吗？
Fiddle doesn't show the hidden characters but I believe they are still there because Number("2015") results in NaN as you can see clearly here
Any ideas?
字符串中确实隐藏了字符，经过调查我发现它们已被创建像这样：
There are indeed hidden characters in the string, and after investigation I found out that they are created like this:
var date = new Date();
var dateToSave = date.toLocaleDateString();
但仅限于IE。
In Chrome或Firefox的输出不包含 U + 200E 从左到右的标记，但在IE中它确实存在！
In Chrome or Firefox the output doesn't contain the U+200E left-to-right mark but in IE it does!
删除 toLocaleDateString（）并将其替换为 kendo.toString（selectedValue，dd / MM / yyyy）解决了问题。
Removing toLocaleDateString() and replacing it with kendo.toString(selectedValue, "dd/MM/yyyy") fixed the problem.
为了记录我还尝试了moment.js和行：
moment（selectedValue）.format（ DD / MM / YYYY）但由于某些原因，IE11在结果字符串的最开头有一个隐藏的 U + 200E 字符。
For the record I also tried moment.js and the line:
moment(selectedValue).format("DD/MM/YYYY") but for some reason in IE11 there was one hidden U+200E character at the very beginning of the result string.
推荐答案
我跑2015年11月6日.split（' '）。map（function（s）{return s.charCodeAt（0）}）（以获取Unicode值）在我的控制台中，找到了一些有趣的东西： [8206 ，49,49,8206,47,8206,48,54,8206,47,8206,50,48,49,53]
I ran "11/06/2015".split('').map(function(s){return s.charCodeAt(0)}) (to get the Unicode values) in my console, and found something interesting: [8206, 49, 49, 8206, 47, 8206, 48, 54, 8206, 47, 8206, 50, 48, 49, 53]
你有 U + 200E从左到右标记。我不知道它是怎么到达的。
You have a U+200E left-to-right mark in there. I don't know how it got there.
删除它，你会没事的。
在这里，您可以复制并粘贴我的字符串：2015年6月11日。
Here, you can copy and paste the string from me: "11/06/2015".
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