Adobe AIR Development

[M4Rv]

Hey guys,

I am currently working on an app where I need to have a function that is able to remove Items from a Picker.

I have an array which includes all the items. And create the Picker similar to this example codes: Link

This is my basic approach code (does not work):

private function removeSubject(subject:String):void {
	var newArrSubjects:Array = [];
	for(var i:int=0; i<arrSubjects.length; i++){
		if(!(arrSubjects[i].label.equals(subject)))
		newArrSubjects.push({label: arrSubjects[i].label});
	}
	arrSubjects = newArrSubjects;
	subjectPicker.dataProvider = createDataProviderSubject();
}

My problem is that I don't know how to really to the test of Equality or how to get the contents of the "label".

I have a function to add an item to the Picker working like that:

private function addSubject(subject:String):void {
	arrSubjects.push({label: subject});
	subjectPicker.dataProvider = createDataProviderSubject();		}

 The createDataProviderSubject() uses the arrSubjects as their Source to create the DataProvider.

Would be very pleased if anyone had a great idea to help me out

[JRab · Accepted solution]

hey,

try running the following code instead and see what you get:

private function removeSubject(subject:String):void
{

    for(var i:int=0; i < arrSubjects.length; i++)
    {
        if(arrSubjects[i].label == subject)
        {
            /**
             * use the splice method of the array
             * to delete the object based on the index
             * 
             */
            newArrSubjects.splice(i,1);

            /** if there is a match break out of for loop */
            break;
        }
    }

    subjectPicker.dataProvider = createDataProviderSubject();
}

This time we are using the same array and simply removing the object u dont want anymore. hope that clears things up. good luck!

[M4Rv]

wow, thank you so much!

[M4Rv]

Still one issue.

I get an error when trying to delete the last item (the one at arrSubject.length-1) of the Picker / Array.

This is what I get:

But the Array / the Picker contains 10 items, so index 9 should be just fine for the last element :/

[M4Rv]

I also rewrote the removeSubject() method.

This time I directly take the index currently selected by the Picker and delete this index in the Array.

private function removeSubject():void {
	var index:int = subjectPicker.selectedIndices[0];
		
	arrSubjects.splice(index,1);
			
	subjectPicker.dataProvider = createDataProviderSubject();
}

To make sure it's not the splice method causing the error I also tried this one:

private function removeSubject():void {
	var index:int = subjectPicker.selectedIndices[0];
			
	if(index == arrSubjects.length-1){
		arrSubjects.pop();
	} else {
		arrSubjects.splice(index,1);
	}
			
	subjectPicker.dataProvider = createDataProviderSubject();
}

But i get the same error message...

[M4Rv]

Ok, i got it solved.

The selectedIndices of the picker needed to be set to a valid value before deleting the item and creating a new DataProvider.