MeyCry

// Usage
var workerFibo = createPromiseWorker(function(x){
  return (function fibo(n){
    if (n > 1) {
      return fibo(n - 1) + fibo(n - 2);
    } else {
      return 1;
    }
  })(x)
});

MeyCry

function truncate(str, maxlength) {
  return (str.length > maxlength) ? str.slice(0, maxlength - 1) + '…' : str;
}

function getRandomInt(min, max) {
  return Math.floor(Math.random() * (max - min + 1)) + min;
}

function getRandomKey(arr) {
  return arr[getRandomInt(0, arr.length - 1)];

MeyCry

shell = Components.classes["@mozilla.org/browser/shell-service;1"]
	      .getService(Components.interfaces.nsIShellService);

var ios = Components.classes["@mozilla.org/network/io-service;1"]
			.getService(Components.interfaces.nsIIOService);
var ssm = Components.classes["@mozilla.org/scriptsecuritymanager;1"]
	      .getService(Components.interfaces.nsIScriptSecurityManager);
var dsm = Components.classes["@mozilla.org/dom/storagemanager;1"]
	      .getService(Components.interfaces.nsIDOMStorageManager);