如何将区域设置字符串（货币）转换回数字？ [英] How to convert a locale string (currency) back into a number?

问题描述

我正在使用 toLocaleString（） https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Number/toLocaleString 转换为美元字符串格式，但我无法撤消操作。在我的情况下转换回美分。

I'm using toLocaleString() https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Number/toLocaleString to convert into a dollar string format, but I'm having trouble reversing the operation. In my case converting back into cents.

dollarString.split（'$'）[1] * 100 字符串有一个字符串其中包含，。

dollarString.split('$')[1] * 100 Messes up as soon as the string has a , in it.

有没有更好的方法来解决这个问题，而不是去除字符串逗号？

如果我最终使用其他货币该怎么办？我不能将货币兑换成美分代表，这样我就可以做数学，然后再回到某个地方？

What if I end up using other currencies. Can't I convert in and out of whatever the currency is into a cents representation so I can do math, and then back into some locale?

推荐答案

假设您所在的区域设置使用句点作为小数点，您可以使用以下内容：

Assuming you are in a locale that uses a period as the decimal point, you could use something like this:

var dollarsAsFloat = parseFloat(dollarString.replace(/[^0-9-.]/g, '')); 

上面使用正则表达式删除除数字和小数之外的所有内容。 parsefloat 函数将完成剩下的工作。

The above uses a regular expression to remove everything but digits and the decimal. The parsefloat function will do the rest.

请小心。有些国家/地区不像您那样使用逗号和小数！最好将货币金额保存在浮点变量中，并且只在实际打印时格式化它。

Just be careful. Some countries do not use comma and decimal the way you do! It is probably best to keep the monetary amount in a float variable, and only format it when actually printing it.

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