javascript - 如何替换括号外的一个逗号

Question

例如我有一段文字:

I would like to eat a pie, I would like to take the dog out, I would like to swim (pie, dog, swim)

我需要一个用 () 之外的新行替换 , 的 JavaScript RegEx 现在如果我使用 .replace(/,/g, "\n") 我会得到:

I would like to eat a pie
I would like to take the dog out
I would like to swim(pie
dog
out)

我需要的是:

I would like to eat a pie
I would like to take the dog out 
I would like to swim(pie,dog,swim)

Answer 1

您可以使用负前瞻的正则表达式(假设括号是平衡的且未转义):

str = str.replace(/,\s*(?![^()]*\))/g, '\n');

RegEx Demo

(?![^()]*\)) 是一个否定的前瞻性断言我们没有 ) 字符前面没有任何 ( 或 ) 之间的字符。

代码:

var str = 'I would like to eat a pie,I would like to take the dog out, I would like to swim(pie,dog,swim)';

console.log(str.replace(/,\s*(?![^()]*\))/g, '\n'));