calculateWhereToPlaceComponent.swift

func calculateWhereToPlaceComponent(component: AlphabetComponent, placeInSecondCollectionView: IndexPath) {
    let componentOrderID = component.orderIdentifier

    var indexPathToAppendTo = 0
    for (index, singleComponent) in newBaseCollectionViewArray.enumerated() {
        ///We are going to check if the singleComponent's order identifier is smaller than componentOrderID.
        ///If it is smaller, we know we must insert the cell ONE to the right of this indexPath.
        if singleComponent.orderIdentifier < componentOrderID {
            indexPathToAppendTo = index + 1
        }
    }

    ///Now that we know where to append the green cell, let's do it!
    newBaseCollectionViewArray.insert(component, at: indexPathToAppendTo)
    let newIndexPath = IndexPath(item: indexPathToAppendTo, section: 0)
    baseCollectionView.insertItems(at: [newIndexPath])

    //we must remove the red cell now.
    secondCollectionViewArray.remove(at: placeInSecondCollectionView.item)
    secondCollectionView.deleteItems(at: [placeInSecondCollectionView])
}