Delete Bandcamp playlist cookies via Greasemonkey

bandcamp.js

// ==UserScript==
// @name     Delete Bandcamp Cookies
// @version  1
// @grant    none
// ==/UserScript==
var getCookieByMatch = function(regex) {
  var cs=document.cookie.split(/;\s*/), ret=[], i;
  for (var i=0; i<cs.length; i++) {
    if (cs[i].match(regex)) {
      ret.push(cs[i].split("=")[0]);
    }
  }
  return ret;
};

var cookies = getCookieByMatch(/^_comm_playlist_.*/);
for (var i = 0; i < cookies.length; i++){
	document.cookie = cookies[i] + "=; expires=Thu, 01 Jan 1970 00:00:00 GMT; path=/; domain=.bandcamp.com";
}