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＆＃39;＃＆＃39;的字符串。我想替换只有奇怪的＃＆＃39;＃＆＃39;用其他东西。

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 ''

  

注意：考虑事件从0开始

Answer 1

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

您可以$1"使用此。替换。请参阅演示。

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);

Answer 2

尝试使用此正则表达式：

#(.*?(?:#|$))

<强> Regex Demo

修改

var reg = /#(.*?(?:#|$))/; 
var message = 'This is my string # This is my string # This is my string # This is my string #';
var substitue = '$1"'; 

var result = message.replace(reg, substitue);
alert(result);

<强> JSFIDDLE DEMO

Answer 3

您可以使用以下正则表达式执行此操作

str.replace(/(#.*?)#/g, '$1"')