ArrayList

Paquete	mx.collections
Clase	public class ArrayList
Herencia	ArrayList EventDispatcher Object
Implementa	IList, IExternalizable, IPropertyChangeNotifier
Subclases	Conflicts

Versión del lenguaje:

ActionScript 3.0

Versión de producto:

Flex 4

Versiones de motor de ejecución:

Flash Player 10, AIR 1.5

The ArrayList class is a simple implementation of IList that uses a backing Array as the source of the data. Items in the backing Array can be accessed and manipulated using the methods and properties of the IList interface. Operations on an ArrayList instance modify the data source; for example, if you use the removeItemAt() method on an ArrayList, you remove the item from the underlying Array. This base class will not throw ItemPendingErrors but it is possible that a subclass might.

  <mx:ArrayList
  Properties
  source="null"
  />

Propiedad MXML predeterminadasource

Propiedades públicas

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	Propiedad		Definido por
		constructor : Object Una referencia a la clase de objeto o función constructora para una instancia de objeto determinada.	Object
		length : int [solo lectura] Get the number of items in the list.	ArrayList
		source : Array The source array for this ArrayList.	ArrayList
		uid : String Provides access to the unique id for this list.	ArrayList

Métodos públicos

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	Método		Definido por
		ArrayList(source:Array = null) Construct a new ArrayList using the specified array as its source.	ArrayList
		addAll(addList:IList):void Adds a list of items to the current list, placing them at the end of the list in the order they are passed.	ArrayList
		addAllAt(addList:IList, index:int):void Adds a list of items to the current list, placing them at the position index passed in to the function.	ArrayList
		addEventListener(type:String, listener:Function, useCapture:Boolean = false, priority:int = 0, useWeakReference:Boolean = false):void Registra un objeto de detector de eventos con un objeto EventDispatcher, de modo que el detector reciba la notificación de un evento.	EventDispatcher
		addItem(item:Object):void Add the specified item to the end of the list.	ArrayList
		addItemAt(item:Object, index:int):void Add the item at the specified index.	ArrayList
		dispatchEvent(event:Event):Boolean Distribuye un evento en el flujo del evento.	EventDispatcher
		getItemAt(index:int, prefetch:int = 0):Object Get the item at the specified index.	ArrayList
		getItemIndex(item:Object):int Return the index of the item if it is in the list such that getItemAt(index) == item.	ArrayList
		hasEventListener(type:String):Boolean Comprueba si el objeto EventDispatcher tiene detectores registrados para un tipo concreto de evento.	EventDispatcher
		hasOwnProperty(name:String):Boolean Indica si un objeto tiene definida una propiedad especificada.	Object
		isPrototypeOf(theClass:Object):Boolean Indica si hay una instancia de la clase Object en la cadena de prototipo del objeto especificado como parámetro.	Object
		itemUpdated(item:Object, property:Object = null, oldValue:Object = null, newValue:Object = null):void Notify the view that an item has been updated.	ArrayList
		propertyIsEnumerable(name:String):Boolean Indica si existe la propiedad especificada y si es enumerable.	Object
		removeAll():void Remove all items from the list.	ArrayList
		removeEventListener(type:String, listener:Function, useCapture:Boolean = false):void Elimina un detector del objeto EventDispatcher.	EventDispatcher
		removeItem(item:Object):Boolean Removes the specified item from this list, should it exist.	ArrayList
		removeItemAt(index:int):Object Remove the item at the specified index and return it.	ArrayList
		setItemAt(item:Object, index:int):Object Place the item at the specified index.	ArrayList
		setPropertyIsEnumerable(name:String, isEnum:Boolean = true):void Establece la disponibilidad de una propiedad dinámica para operaciones de bucle.	Object
		toArray():Array Return an Array that is populated in the same order as the IList implementation.	ArrayList
		toLocaleString():String Devuelve la representación de cadena de este objeto, con formato según las convenciones específicas de configuración regional.	Object
		toString():String [override] Pretty prints the contents of this ArrayList to a string and returns it.	ArrayList
		valueOf():Object Devuelve el valor simple del objeto especificado.	Object
		willTrigger(type:String):Boolean Comprueba si hay registrado un detector de eventos con este objeto EventDispatcher o con cualquiera de sus ascendientes para el tipo de evento concreto.	EventDispatcher

Métodos protegidos

	Método		Definido por
		itemUpdateHandler(event:PropertyChangeEvent):void Called when any of the contained items in the list dispatch an ObjectChange event.	ArrayList
		startTrackUpdates(item:Object):void If the item is an IEventDispatcher, watch it for updates.	ArrayList
		stopTrackUpdates(item:Object):void If the item is an IEventDispatcher, stop watching it for updates.	ArrayList

Eventos

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	Resumen	Definido por
activate	[evento broadcast] Se distribuye cuando Flash Player o AIR pasan a estar activos.	EventDispatcher
collectionChange	Dispatched when the IList has been updated in some way.	ArrayList
deactivate	[evento broadcast] Se distribuye cuando Flash Player o de AIR pasan a estar inactivos.	EventDispatcher

Información sobre propiedades

length

propiedad

length:int [solo lectura]

Versión del lenguaje:

ActionScript 3.0

Versión de producto:

Flex 3

Versiones de motor de ejecución:

Flash Player 9, AIR 1.1

Get the number of items in the list. An ArrayList should always know its length so it shouldn't return -1, though a subclass may override that behavior.

Esta propiedad se puede utilizar como origen para la vinculación de datos. Cuando se modifica esta propiedad, distribuye el evento collectionChange .

Implementación
public function get length():int

source

propiedad

source:Array

Versión del lenguaje:

ActionScript 3.0

Versión de producto:

Flex 3

Versiones de motor de ejecución:

Flash Player 9, AIR 1.1

The source array for this ArrayList. Any changes done through the IList interface will be reflected in the source array. If no source array was supplied the ArrayList will create one internally. Changes made directly to the underlying Array (e.g., calling theList.source.pop() will not cause CollectionEvents to be dispatched.

Implementación
public function get source():Array
public function set source(value:Array):void

uid

propiedad

uid:String

Versión del lenguaje:

ActionScript 3.0

Versión de producto:

Flex 3

Versiones de motor de ejecución:

Flash Player 9, AIR 1.1

Provides access to the unique id for this list.

Implementación
public function get uid():String
public function set uid(value:String):void

Información sobre constructores

()

Información sobre

public function ArrayList(source:Array = null)

Versión del lenguaje:

ActionScript 3.0

Versión de producto:

Flex 3

Versiones de motor de ejecución:

Flash Player 9, AIR 1.1

Construct a new ArrayList using the specified array as its source. If no source is specified an empty array will be used.

Parámetros

source:Array (default = null) — The Array to use as a source for the ArrayList.

Información sobre métodos

addAll

()

método

public function addAll(addList:IList):void

Versión del lenguaje:

ActionScript 3.0

Versión de producto:

Flex 3

Versiones de motor de ejecución:

Flash Player 9, AIR 1.1

Adds a list of items to the current list, placing them at the end of the list in the order they are passed.

Parámetros

addList:IList — The list of items to add to the current list

addAllAt

()

método

public function addAllAt(addList:IList, index:int):void

Versión del lenguaje:

ActionScript 3.0

Versión de producto:

Flex 3

Versiones de motor de ejecución:

Flash Player 9, AIR 1.1

Adds a list of items to the current list, placing them at the position index passed in to the function. The items are placed at the index location and placed in the order they are recieved.

Parámetros

	`addList:IList` — The list of items to add to the current list

	`index:int` — The location of the current list to place the new items.

addItem

()

método

public function addItem(item:Object):void

Versión del lenguaje:

ActionScript 3.0

Versión de producto:

Flex 3

Versiones de motor de ejecución:

Flash Player 9, AIR 1.1

Add the specified item to the end of the list. Equivalent to addItemAt(item, length);

Parámetros

item:Object — the item to add

addItemAt

()

método

public function addItemAt(item:Object, index:int):void

Versión del lenguaje:

ActionScript 3.0

Versión de producto:

Flex 3

Versiones de motor de ejecución:

Flash Player 9, AIR 1.1

Add the item at the specified index. Any item that was after this index is moved out by one.

Parámetros

	`item:Object` — the item to place at the index

	`index:int` — the index at which to place the item

Emite

RangeError — if index is less than 0 or greater than the length

getItemAt

()

método

public function getItemAt(index:int, prefetch:int = 0):Object

Versión del lenguaje:

ActionScript 3.0

Versión de producto:

Flex 3

Versiones de motor de ejecución:

Flash Player 9, AIR 1.1

Get the item at the specified index.

Parámetros

	`index:int` — the index in the list from which to retrieve the item

	`prefetch:int` (default = `0`) — int indicating both the direction and amount of items to fetch during the request should the item not be local.

Valor devuelto

Object — the item at that index, null if there is none

Emite

	`Error` — if the data for that index needs to be loaded from a remote location

	`RangeError` — if the index < 0 or index >= length

getItemIndex

()

método

public function getItemIndex(item:Object):int

Versión del lenguaje:

ActionScript 3.0

Versión de producto:

Flex 3

Versiones de motor de ejecución:

Flash Player 9, AIR 1.1

Return the index of the item if it is in the list such that getItemAt(index) == item. Note that in this implementation the search is linear and is therefore O(n).

Parámetros

item:Object — the item to find

Valor devuelto

int — the index of the item, -1 if the item is not in the list.

itemUpdated

()

método

public function itemUpdated(item:Object, property:Object = null, oldValue:Object = null, newValue:Object = null):void

Versión del lenguaje:

ActionScript 3.0

Versión de producto:

Flex 3

Versiones de motor de ejecución:

Flash Player 9, AIR 1.1

Notify the view that an item has been updated. This is useful if the contents of the view do not implement IEventDispatcher. If a property is specified the view may be able to optimize its notification mechanism. Otherwise it may choose to simply refresh the whole view.

Parámetros

	`item:Object` — The item within the view that was updated.

	`property:Object` (default = `null`) — A String, QName, or int specifying the property that was updated.

	`oldValue:Object` (default = `null`) — The old value of that property. (If property was null, this can be the old value of the item.)

	`newValue:Object` (default = `null`) — The new value of that property. (If property was null, there's no need to specify this as the item is assumed to be the new value.)

Elementos de API relacionados

mx.events.CollectionEvent
mx.core.IPropertyChangeNotifier
mx.events.PropertyChangeEvent

itemUpdateHandler

()

método

protected function itemUpdateHandler(event:PropertyChangeEvent):void

Versión del lenguaje:

ActionScript 3.0

Versión de producto:

Flex 3

Versiones de motor de ejecución:

Flash Player 9, AIR 1.1

Called when any of the contained items in the list dispatch an ObjectChange event. Wraps it in a CollectionEventKind.UPDATE object.

Parámetros

event:PropertyChangeEvent — The event object for the ObjectChange event.

removeAll

()

método

public function removeAll():void

Versión del lenguaje:

ActionScript 3.0

Versión de producto:

Flex 3

Versiones de motor de ejecución:

Flash Player 9, AIR 1.1

Remove all items from the list.

removeItem

()

método

public function removeItem(item:Object):Boolean

Versión del lenguaje:

ActionScript 3.0

Versión de producto:

Flex 3

Versiones de motor de ejecución:

Flash Player 9, AIR 1.1

Removes the specified item from this list, should it exist.

Parámetros

item:Object — Object reference to the item that should be removed.

Valor devuelto

Boolean — Boolean indicating if the item was removed.

removeItemAt

()

método

public function removeItemAt(index:int):Object

Versión del lenguaje:

ActionScript 3.0

Versión de producto:

Flex 3

Versiones de motor de ejecución:

Flash Player 9, AIR 1.1

Remove the item at the specified index and return it. Any items that were after this index are now one index earlier.

Parámetros

index:int — The index from which to remove the item.

Valor devuelto

Object — The item that was removed.

Emite

RangeError — if index < 0 or index >= length.

setItemAt

()

método

public function setItemAt(item:Object, index:int):Object

Versión del lenguaje:

ActionScript 3.0

Versión de producto:

Flex 3

Versiones de motor de ejecución:

Flash Player 9, AIR 1.1

Place the item at the specified index. If an item was already at that index the new item will replace it and it will be returned.

Parámetros

	`item:Object` — the new value for the index

	`index:int` — the index at which to place the item

Valor devuelto

Object — the item that was replaced, null if none

Emite

RangeError — if index is less than 0 or greater than or equal to length

startTrackUpdates

()

método

protected function startTrackUpdates(item:Object):void

Versión del lenguaje:

ActionScript 3.0

Versión de producto:

Flex 3

Versiones de motor de ejecución:

Flash Player 9, AIR 1.1

If the item is an IEventDispatcher, watch it for updates. This method is called by the addItemAt() method, and when the source is initially assigned.

Parámetros

item:Object — The item passed to the addItemAt() method.

stopTrackUpdates

()

método

protected function stopTrackUpdates(item:Object):void

Versión del lenguaje:

ActionScript 3.0

Versión de producto:

Flex 3

Versiones de motor de ejecución:

Flash Player 9, AIR 1.1

If the item is an IEventDispatcher, stop watching it for updates. This method is called by the removeItemAt() and removeAll() methods, and before a new source is assigned.

Parámetros

item:Object — The item passed to the removeItemAt() method.

toArray

()

método

public function toArray():Array

Versión del lenguaje:

ActionScript 3.0

Versión de producto:

Flex 3

Versiones de motor de ejecución:

Flash Player 9, AIR 1.1

Return an Array that is populated in the same order as the IList implementation.

Valor devuelto

Array — An Array populated in the same order as the IList implementation.

Emite

Error — if the data is not yet completely loaded from a remote location

toString

()

método

override public function toString():String

Versión del lenguaje:

ActionScript 3.0

Versión de producto:

Flex 3

Versiones de motor de ejecución:

Flash Player 9, AIR 1.1

Pretty prints the contents of this ArrayList to a string and returns it.

Valor devuelto

String — A String containing the contents of the ArrayList.

Información sobre eventos

collectionChange

Evento

Tipo de objeto de evento: mx.events.CollectionEvent
propiedad CollectionEvent.type = mx.events.CollectionEvent.COLLECTION_CHANGE

Versión del lenguaje:

ActionScript 3.0

Versión de producto:

Flex 3

Versiones de motor de ejecución:

Flash Player 9, AIR 1.1

Dispatched when the IList has been updated in some way.

The CollectionEvent.COLLECTION_CHANGE constant defines the value of the type property of the event object for an event that is dispatched when a collection has changed.

The properties of the event object have the following values. Not all properties are meaningful for all kinds of events. See the detailed property descriptions for more information.

Property	Value
`bubbles`	false
`cancelable`	false
`currentTarget`	The Object that defines the event listener that handles the event. For example, if you use `myButton.addEventListener()` to register an event listener, myButton is the value of the `currentTarget`.
`items`	An Array of objects with information about the items affected by the event. The contents of this field depend on the event kind; for details see the `items` property
`kind`	The kind of event. The valid values are defined in the CollectionEventKind class as constants.
`location`	Location within the target collection of the item(s) specified in the `items` property.
`oldLocation`	the previous location in the collection of the item specified in the `items` property.
`target`	The Object that dispatched the event; it is not always the Object listening for the event. Use the `currentTarget` property to always access the Object listening for the event.
`type`	CollectionEvent.COLLECTION_CHANGE

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ArrayList - AS3 Flex

Paquetesx

Elementos del lenguaje

Apéndices

Paquete mx.collections

length

source

uid

ArrayList

addAll

addAllAt

addItem

addItemAt

getItemAt

getItemIndex

itemUpdated

itemUpdateHandler

removeAll

removeItem

removeItemAt

setItemAt

startTrackUpdates

stopTrackUpdates

toArray

toString

collectionChange