javascript - 在javascript中使用正则表达式替换字符的奇数出现

Question

我有一个包含“#”的字符串。我想用其他东西替换仅出现的奇数“#”。

例如对于下面的字符串

This is my string # This is my string # This is my string # This is my string #

输出应该是

This is my string # This is my string '' This is my string # This is my string ''

Note : considering occurrence starts with 0

Answer 1

([^#]*#[^#]*)#

您可以使用它。替换为 $1"。查看演示。

https://regex101.com/r/cT0hV4/9

var re = /([^#]*#[^#]*)#/gm; 
var str = 'This is my string # This is my string # This is my string # This is my string #';
var subst = '$1"'; 

var result = str.replace(re, subst);