Question

I am trying to pass a simple string to an event listener in order to identify an appropriate array object to modify. I understand by looking at the log (shown in comments) that what I am passing is an object and it can’t be compared directly to another object’s property.

Should I pass an object that has the string as a property (like the array object does), or is there a more appropriate way to reference the object as a string or call its name somehow (like the log does in the first comment)?

// I just want to pass a string as an argument. Here is a static example.
var timestampID = '1307740835264';
Ti.App.fireEvent('confirmation',timestampID);

Notice how the first log output interprets the argument as a string, but the if comparison recognizes it as an object.

Ti.App.addEventListener('confirmation',function(timestampID) { // produces "[DEBUG] fire app event: confirmation with 1307740835264"
    Ti.API.info(timestampID); // produces "[INFO] { type = confirmation; }"
    for (i=0;i<myArray.length;i++) {
        Ti.API.info(myArray[i].timestampID + ' | ' + timestampID); // produces "[INFO] 1307740835264 | [object Object]"
        if (myArray[i].timestampID == timestampID) { // will produce false
            // will never happen
        }
    }
});

Thanks!

Answer 1

So to me it looks like the timestampID being passed in to the handler is an object, however from the second statement (and accompanying [INFO] comment), I have absolutely no idea what properties it has. Let’s assume that it has a property called timestamp. Then your if statement should be

if (myArray[i].timestampID === timestampID.timestamp) 

But that’s about all I can glean from this code snippet I’m afraid.

UPDATE: OK, I see how you’re triggering the event. The Titanium API is bafflingly obtuse on this point (it looks like the help for fireEvent is wrong: two parameters called “name”?). There are no examples that I can see. However it does say that what you pass in as the data is (must be?) serialized as JSON.

Now that I know that, looking at the second statement’s [INFO] line it makes more sense. It’s a string that has the JSON data. Your data is missing since it was a string value. Try this to fire:

Ti.App.fireEvent('confirmation', { timestampID: '1307740835264' } );

and this in the event handler:

Ti.App.addEventListener('confirmation', function (data) {
  for (i=0;i<myArray.length;i++) {
    if (myArray[i].timestampID === data.timestampID) { 
        ...code...
    }
}

});