Hi, > When I change the line into "new PeriodicalExecuter > (myobject.unknownMethod(), 3);", firebug at once states correctly that > this function doesn't exist, which is right.
And if it did exist, it would execute once, immediately, and the PeriodicalExecuter would fail three seconds later. This line of code: new PeriodicalExecuter(obj.method(), 3); ...like any other function call runs obj.method _immediately_ and passes the return value of the method into the PeriodicalExecuter constructor. Unless the method returns a function reference, that's not going to work. You probably want to do this: new PeriodicalExecuter(obj.method.bind(obj), 3); Note that we are *not* calling method here; we're calling bind and telling it to return a function that, when called, will call obj.method. If you're not using an object method, just a function, you don't need bind: new PeriodicalExecuter(someFunction, 3); Note, again, that we are not *calling* someFunction there (there are no parens after it), we're just passing a reference to it into the constructor. [1] http://prototypejs.org/api/periodicalExecuter [2] http://prototypejs.org/api/function/bind HTH, -- T.J. Crowder tj / crowder software / com Independent Software Engineer, consulting services available On Aug 7, 1:30 am, Schweitzer <[email protected]> wrote: > Hi there! > > Got an error with Prototypes PeriodicalExecuter() (Version 1.6.0.3): > When I use the "verified" (http://www.prototypejs.org/api/ > periodicalExecuter) "new PeriodicalExecuter(myobject.testMethod(), > 3);", everything seems fine (no error in Firebug etc) but after 3 > Seconds an error "this.callback is not a function [...]/prototype.js > Line 308" appears. testMethod was not started. > > The line "new PeriodicalExecuter(function() { alert("test"); }, 3);" > works when written instead. > > When I change the line into "new PeriodicalExecuter > (myobject.unknownMethod(), 3);", firebug at once states correctly that > this function doesn't exist, which is right. > > Now I wonder about why this error appears. As you may imagine, > testMethod() is part of an Object, but the error appears outside as > inside the initialize()-function of the "Class" created by Class.create > (). Even outside the "class". The used testMethod() seems to exist > nonetheless. > > I would like to read any hint or maybe solution to this problem, > please feel free to ask for more information, too. > > Schweitzer --~--~---------~--~----~------------~-------~--~----~ You received this message because you are subscribed to the Google Groups "Prototype & script.aculo.us" group. To post to this group, send email to [email protected] To unsubscribe from this group, send email to [email protected] For more options, visit this group at http://groups.google.com/group/prototype-scriptaculous?hl=en -~----------~----~----~----~------~----~------~--~---
