Class EmberArray

public
Uses: Enumerable
Module: @ember/array
Since: vEmber 0.9.0
import EmberArray from '@ember/array';

This mixin implements Observer-friendly Array-like behavior. It is not a concrete implementation, but it can be used up by other classes that want to appear like arrays.

For example, ArrayProxy is a concrete classes that can be instantiated to implement array-like behavior. Both of these classes use the Array Mixin by way of the MutableArray mixin, which allows observable changes to be made to the underlying array.

This mixin defines methods specifically for collections that provide index-ordered access to their contents. When you are designing code that needs to accept any kind of Array-like object, you should use these methods instead of Array primitives because these will properly notify observers of changes to the array.

Although these methods are efficient, they do add a layer of indirection to your application so it is a good idea to use them only when you need the flexibility of using both true JavaScript arrays and "virtual" arrays such as controllers and collections.

You can use the methods defined in this module to access and modify array contents in a KVO-friendly way. You can also be notified whenever the membership of an array changes by using .observes('myArray.[]').

To support EmberArray in your own class, you must override two primitives to use it: length() and objectAt().

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Module: @ember/array
returns
this

This is the handler for the special array content property. If you get this property, it will return this. If you set this property to a new array, it will replace the current content.

Module: @ember/array
returns
Object | undefined
The first object in the array

The first object in the array, or undefined if the array is empty.

Module: @ember/array

Becomes true whenever the array currently has observers watching changes on the array.

Module: @ember/array
returns
Object | undefined
The last object in the array

The last object in the array, or undefined if the array is empty.

Module: @ember/array

Required. You must implement this method to apply this mixin.

Your array must support the length property. Your replace methods should set this property whenever it changes.