在 JavaScript 中从字符串中去除所有非数字字符
声明：本页面是StackOverFlow热门问题的中英对照翻译，遵循CC BY-SA 4.0协议，如果您需要使用它，必须同样遵循CC BY-SA许可，注明原文地址和作者信息，同时你必须将它归于原作者（不是我）：StackOverFlow
原文地址: http://stackoverflow.com/questions/1862130/
Warning: these are provided under cc-by-sa 4.0 license. You are free to use/share it, But you must attribute it to the original authors (not me):
StackOverFlow
Strip all non-numeric characters from string in JavaScript
提问by p.campbell
Consider a non-DOM scenario where you'd want to remove all non-numeric characters from a string using JavaScript/ECMAScript. Any characters that are in range 0 - 9should be kept.
考虑一个非 DOM 场景，您希望使用 JavaScript/ECMAScript 从字符串中删除所有非数字字符。0 - 9应保留范围内的任何字符。
var myString = 'abc123.8<blah>';
//desired output is 1238
How would you achieve this in plain JavaScript? Please remember this is a non-DOM scenario, so jQuery and other solutions involving browser and keypress events aren't suitable.
你将如何在纯 JavaScript 中实现这一点？请记住，这是一个非 DOM 场景，因此 jQuery 和其他涉及浏览器和按键事件的解决方案不适合。
回答by csj
回答by max4ever
If you need this to leave the dot for float numbers, use this
如果您需要它为浮点数留下点，请使用此
var s = "-12345.50 ".replace(/[^\d.-]/g, ''); // gives "-12345.50"
回答by Auraseer
Use a regular expression, if your script implementation supports them. Something like:
如果您的脚本实现支持正则表达式，请使用正则表达式。就像是：
myString.replace(/[^0-9]/g, '');
回答by CMS
回答by Jan Han?i?
Something along the lines of:
类似的东西：
yourString = yourString.replace ( /[^0-9]/g, '' );
回答by Kamil Kie?czewski
try
尝试
myString.match(/\d/g).join``
var myString = 'abc123.8<blah>'
console.log( myString.match(/\d/g).join`` );回答by Grant
In Angular / Ionic / VueJS -- I just came up with a simple method of:
在 Angular / Ionic / VueJS 中——我只是想出了一个简单的方法：
stripNaN(txt: any) {
return txt.toString().replace(/[^a-zA-Z0-9]/g, "");
}
Usage on the view:
视图上的用法：
<a [href]="'tel:'+stripNaN(single.meta['phone'])" [innerHTML]="stripNaN(single.meta['phone'])"></a>
回答by Chaos Legion
Unfortunately none of the answers above worked for me.
不幸的是，上面的答案都不适合我。
I was looking to convert currency numbers from strings like $123,232,122.11(1232332122.11) or USD 123,122.892(123122.892) or any currency like ? 98,79,112.50(9879112.5) to give me a number output including the decimal pointer.
我希望将货币数字从$123,232,122.11(1232332122.11) 或USD 123,122.892(123122.892) 或任何货币? 98,79,112.50(9879112.5)等字符串转换为我的数字输出，包括小数点指针。
Had to make my own regex which looks something like this:
必须制作我自己的正则表达式，它看起来像这样：
str = str.match(/\d|\./g).join('');
回答by Hymanosaur
Short function to remove all non-numeric characters but keep the decimal (and return the number):
删除所有非数字字符但保留小数（并返回数字）的短函数：
parseNum = str => +str.replace(/[^.\d]/g, '');
let str = 'a1b2c.d3e';
console.log(parseNum(str));回答by Frank Wisniewski
we are in 2017now you can also use ES2016
我们在2017现在你也可以使用ES2016
var a = 'abc123.8<blah>';
console.log([...a].filter( e => isFinite(e)).join(''));
or
或者
console.log([...'abc123.8<blah>'].filter( e => isFinite(e)).join(''));
The result is
结果是
1238
