Remove all special consecutive characters-CodePudding

Hopefully a simple one but I can't find any exact thread on SO for this particular instance:

If I have a string with multiple special characters in a row i.e 'this-is--a---string' I want to remove all duplicate non alphanumeric characters with regex so it would end up as 'this-is-a-string'

The closest i've found is .replace(/(.)\1 /g, '$1') but this removes duplicate letters rather than just special characters.

On a side note if anyone knows how to remove any non alphanumeric characters from the end of a string with regex then that would be really useful too!

Thanks in advance!

CodePudding user response：

Since you want to collapse only repeated non alphanumeric characters, it should be enough to change your regex replacing the . character class with something that will negate the alphanumeric group [^a-zA-Z0-9].

subject = "a---------------bbbbbb6times_______@@@@@@";

var myregexp = /([^a-zA-Z0-9])\1 /mg;
result = subject.replace(myregexp, "$1");

console.log(result);