debug.js: some JS debugging tools

debug.js

 define({
   
   haltOnModification : function(obj, property) {
    Object.defineProperty(obj, property, {
      set : function(value) {
        debugger;
      }
    }
   },
   
   createArgLogger : function(prefix) {
     prefix = prefix || '';
     return function() {
       console.log(prefix, arguments);
     }
   }
   
 });