如何在 Javascript 中替换正则表达式子字符串匹配？
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How can I replace a regex substring match in Javascript?
提问by dave
var str = 'asd-0.testing';
var regex = /asd-(\d)\.\w+/;
str.replace(regex, 1);
That replaces the entire string strwith 1. I want it to replace the matched substring instead of the whole string. Is this possible in Javascript?
替换整个字符串str用1。我希望它替换匹配的子字符串而不是整个字符串。这在 Javascript 中可能吗？
回答by Amarghosh
var str = 'asd-0.testing';
var regex = /(asd-)\d(\.\w+)/;
str = str.replace(regex, "");
console.log(str);
Or if you're sure there won't be any other digits in the string:
或者，如果您确定字符串中不会有任何其他数字：
var str = 'asd-0.testing';
var regex = /\d/;
str = str.replace(regex, "1");
console.log(str);
回答by dave
using str.replace(regex, $1);:
使用str.replace(regex, $1);：
var str = 'asd-0.testing';
var regex = /(asd-)\d(\.\w+)/;
if (str.match(regex)) {
str = str.replace(regex, "" + "1" + "");
}
Edit: adaptation regarding the comment
编辑：关于评论的改编
回答by Félix Saparelli
I would get the part before and after what you want to replace and put them either side.
我会在你想要更换的东西前后拿到零件，然后把它们放在两边。
Like:
喜欢：
var str = 'asd-0.testing';
var regex = /(asd-)\d(\.\w+)/;
var matches = str.match(regex);
var result = matches[1] + "1" + matches[2];
// With ES6:
var result = `${matches[1]}1${matches[2]}`;
回答by Lantanios
I think the simplest way to achieve your goal is this:
我认为实现目标的最简单方法是：
var str = 'asd-0.testing';
var regex = /(asd-)(\d)(\.\w+)/;
var anyNumber = 1;
var res = str.replace(regex, `${anyNumber}`);
