使用RegExp匹配括号，然后递增它 [英] Use RegExp to match a parenthetical number then increment it

问题描述

我一直试图找到一种方法来匹配字符串末尾括号内的Javascript字符串中的数字，然后递增它。

I've been trying to find a way to match a number in a Javascript string that is surrounded by parenthesis at the end of the string, then increment it.

说我有一个字符串：

var name = "Item Name (4)";

我需要一个RegExp来匹配（4）部分，然后我需要增加4然后把它放回字符串。

I need a RegExp to match the (4) part, and then I need to increment the 4 then put it back into the string.

这是我到目前为止的正则表达式：

This is the regex I have so far:

\b([0-9]+)$\b

这个正则表达式不起作用。此外，我不知道如何提取检索到的整数并将其放回字符串中的相同位置。

This regex does not work. Furthermore, I do not know how to extract the integer retrieved and put it back in the same location in the string.

谢谢。

推荐答案

replace方法可以将函数作为其第二个参数。它获取匹配（包括子匹配）并返回替换字符串。其他人已经提到括号需要转义。

The replace method can take a function as its second argument. It gets the match (including submatches) and returns the replacement string. Others have already mentioned that the parentheses need to be escaped.

"Item Name (4)".replace(/\((\d+)\)/, function(fullMatch, n) {
    return "(" + (Number(n) + 1) + ")";
});

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