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object_setDefault

If object does not have key, add it.

As of 2021-06-03. See the latest version.

This script should not be not be installed directly. It is a library for other scripts to include with the meta directive // @require https://update.greatest.deepsurf.us/scripts/427473/937458/object_setDefault.js 

  1. // ==UserScript==
  2. // @name         object_setDefault
  3. // @namespace    bo.gd.an[at]rambler.ru
  4. // @version      0.3
  5. // @description  If object does not have key, add it.
  6. // @author       Bogudan
  7. // @license      LGPLv3
  8. // @include      https://localhost/
  9. // ==/UserScript==
  10.  
  11. Object.defineProperty (Object.prototype, 'setDefault', {
  12.     value : function (key, value) {
  13.     	if (!(key in this))
  14. 	    	this [key] = value;
  15. 	    }
  16.     });