How to check Object existence in ListModel

Question

I want to add object dynamically to the ListModel. But I need to append the object only if it does not exist in the model.

I gone through the Documentation I couldn't find any methods for this. Is there any other ways to check this

You can loop over the ListModel. However it is not designed for that. You should consider implementing some kind of SetModel yourself in C++. — derM
You can relate to ListModel as array of elements with ListModel.count and ListModel.get() — folibis

user3407729 user3407729 · Accepted Answer · 2016-10-26T18:29:28

The ListModel method get(index) enables you to access each element. It also has a property count, which tells you how many elements are in it. So, something like this:

function appendIfNotExist(objectToAppend) {
    for (var i = 0; i < myListModel.count; i++) {
        if (myListModel.get(i) == objectToAppend) {
            return
        }
    }
    ListModel.append(objectToAppend)
}

How to check Object existence in ListModel

1 Answers