javascript 使用javascript从字符串中提取数字
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/17851934/
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
Extract numbers from a string using javascript
提问by FLuttenb
I'd like to extract the numbers from the following string via javascript/jquery:
我想通过 javascript/jquery 从以下字符串中提取数字：
"ch2sl4"
problem is that the string could also look like this:
问题是字符串也可能如下所示：
"ch10sl4"
or this
或这个
"ch2sl10"
I'd like to store the 2 numbers in 2 variables.
Is there any way to use matchso it extracts the numbers before and after "sl"? Would matcheven be the correct function to do the extraction?
我想将 2 个数字存储在 2 个变量中。有什么方法可以使用match它来提取前后的数字"sl"吗？会match甚至是正确的函数来进行提取？
Thx
谢谢
回答by georg
Yes, matchis the way to go:
是的，match是要走的路：
var matches = str.match(/(\d+)sl(\d+)/);
var number1 = Number(matches[1]);
var number2 = Number(matches[2]);
回答by Elias Van Ootegem
If the string is always going to look like this: "ch[num1]sl[num2]", you can easily get the numbers without a regex like so:
如果字符串总是看起来像这样："ch[num1]sl[num2]"，你可以很容易地得到没有正则表达式的数字，如下所示：
var numbers = str.substr(2).split('sl');
//chop off leading ch---/\ /\-- use sl to split the string into 2 parts.
In the case of "ch2sl4", numberswill look like this: ["2", "4"], coerce them to numbers like so: var num1 = +(numbers[0]), or numbers.map(function(a){ return +(a);}.
在"ch2sl4"的情况下，numbers将如下所示：["2", "4"]，将它们强制为数字，如下所示：var num1 = +(numbers[0])或numbers.map(function(a){ return +(a);}。
If the string parts are variable, this does it all in one fell swoop:
如果字符串部分是可变的，这将一举完成：
var str = 'ch2fsl4';
var numbers = str.match(/[0-9]+/g).map(function(n)
{//just coerce to numbers
return +(n);
});
console.log(numbers);//[2,4]
回答by Mark Walters
As an alternative just to show how things can be achieved in many different ways
作为一种替代方法，只是为了展示如何以多种不同的方式实现目标
var str = "ch2sl10";
var num1 = +(str.split("sl")[0].match(/\d+/));
var num2 = +(str.split("sl")[1].match(/\d+/));
回答by sharad-garg
Try below code
试试下面的代码
var tz = "GMT-7";
var tzOff = tz.replace( /[^+-\d.]/g, '');
alert(parseInt(tzOff));
