Regular expression to replace middle chars of a string-CodePudding

I would like to replace middle 4 characters of a string with ****

For example: ABCDEFG should become AB****G

Please suggest a Regex to achieve this.

Note: The length of the string is always same.

CodePudding user response：

its just 1 line no need to use regex if you replace the same index every time:

mystr='ABCDEFG'    
newstr=mystr[0:2] '****' mystr[-1]

CodePudding user response：

Found the solution that I was looking for:

var s="ABCDEFG"
var reg=/\b(\w{2})\w (\w)\b/g

s.replace(reg, '$1**$2');

output: AB****G

This will replace all the middle chars except first 2 and last 1 char in a string.