在 JavaScript 中使用逗号小数分隔符解析数字
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Parsing numbers with a comma decimal separator in JavaScript
提问by Chaos
I used this function to check if a value is a number:
我用这个函数来检查一个值是否是一个数字：
function isNumber(n) {
return !isNaN(parseFloat(n)) && isFinite(n);
}
My program need to work with German values. We use a comma as the decimal separator instead of a dot, so this function doesn't work.
我的程序需要使用德国的价值观。我们使用逗号而不是点作为小数点分隔符，因此此功能不起作用。
I tried to do this:
我试图这样做：
n.replace(",",".")
But it also doesn't seem to work. The exact function I tried to use is:
但它似乎也不起作用。我尝试使用的确切功能是：
function isNumber(n) {
n=n.replace(",",".");
return !isNaN(parseFloat(n)) && isFinite(n);
}
The number looks like this 9.000,28instead of the usual 9,000.28if my statement wasn't clear enough.
如果我的陈述不够清楚，数字看起来像这样9.000,28而不是通常的9,000.28。
回答by rink.attendant.6
You need to replace (remove) the dots first in the thousands separator, then take care of the decimal:
您需要先替换（删除）千位分隔符中的点，然后处理小数点：
function isNumber(n) {
'use strict';
n = n.replace(/\./g, '').replace(',', '.');
return !isNaN(parseFloat(n)) && isFinite(n);
}
回答by Anthony
var number = parseFloat(obj.value.replace(",",""));
You'll probably also want this to go the other way...
你可能也希望这件事反过来......
obj.value = number.toLocaleString('en-US', {minimumFractionDigits: 2});
回答by Jonathan Batista
I believe the best way of doing this is simply using the toLocaleString method. For instance, I live in Brazil, here we have comma as decimal separator. Then I can do:
我相信最好的方法就是使用 toLocaleString 方法。例如，我住在巴西，这里我们用逗号作为小数点分隔符。然后我可以这样做：
var number = 10.01;
console.log(number)
// log: 10.01
console.log(number.toLocaleString("pt-BR"));
// log: 10,01
