in docs-content/examples-source/cdk/drag-drop/cdk-drag-drop-connected-sorting/cdk-drag-drop-connected-sorting-example.ts [17:28]
drop(event: CdkDragDrop<string[]>) {
if (event.previousContainer === event.container) {
moveItemInArray(event.container.data, event.previousIndex, event.currentIndex);
} else {
transferArrayItem(
event.previousContainer.data,
event.container.data,
event.previousIndex,
event.currentIndex,
);
}
}