Ember.TrackedArray Class packages/ember-runtime/lib/system/tracked_array.js:7
Defined in: packages/ember-runtime/lib/system/tracked_array.js:7
Module: ember
An Ember.TrackedArray tracks array operations. It's useful when you want to
lazily compute the indexes of items in an array after they've been shifted by
subsequent operations.
Methods
Properties
_findArrayOperation
(index)
private
Return an ArrayOperationMatch for the operation that contains the item at index.
Parameters:
- index Number
- the index of the item whose operation information should be returned.
addItems
(index, newItems)
Track that newItems were added to the tracked array at index.
Parameters:
- index
- newItems
apply
(callback)
Apply all operations, reducing them to retain:n, for n, the number of
items in the array.
callback will be called for each operation and will be passed the following arguments:
* {array} items The items for the given operation
* {number} offset The computed offset of the items, ie the index in the
array of the first item for this operation.
* {string} operation The type of the operation. One of
Ember.TrackedArray.{RETAIN, DELETE, INSERT}
Parameters:
- callback Function
removeItems
(index, count)
Track that count items were removed at index.
Parameters:
- index
- count
{array} items The items of the operation, if included. RETAIN and
INSERT include their items, DELETE does not.
String
private
Internal data structure to represent an array operation.
{number} rangeStart The index of the first item in the operation,
with respect to the tracked array. The index of the last item can be computed
from `rangeStart` and `operation.count`.
ArrayOperation
private
Internal data structure used to include information when looking up operations by item index.