Moves an item in the Collection to a specified index. Removes an item from the collection at a specified index. Reduces all items in the collection (from right to left) into a single variable using callback. Reduces all items in the collection (from left to right) into a single variable using callback. Removes the last item from the collection and returns it.Īdds an item(s) to the end of the collection. Registers an event handler on the instance. Passes each Collection item into the callback function and returns a new array of the returned values.Ĭreates a subclass of Collection containing a typed object. Returns the last index of an element in the collection. Returns the index of an element in the collection.ĭetermines whether the passed value is a Collection.Ĭreates a string representation of the items in the Collection. Tests if an item is present in the new Collection. Indicates whether there is an event listener on the instance that matches the provided event name. Returns the index of an item in the Collection if that item passes a test as defined in the callback function.įlattens a hierarchical Collection containing at least one child collection.Įxecutes the input function for each item in the Collection. Returns an item in the Collection if that item passes a test as defined in the callback function. Method Overview NameĬreates a new Collection containing the items in the original Collection joined with the items in the input array or Collection.ĭetermines whether all items in the Collection pass a test defined by callback.įilters the Collection's items based on a test defined by the callback function. a collection of graphics displayed in the view const graphics = view. The change event should be used to notify the developer/user of changes made to the collection.Īs of version 4.18, you can iterate through the items of a Collection using for.of. Since properties of type Collection cannot be watched, The change event fires each time an item is added, moved, or removedįrom the Collection. Removes a layer from the map using Collection.remove() To add, remove, re-order, or manipulate graphics in a GraphicsLayer.Īnother example of a Collection is Map.layers, which is a Collection of operational layers included in You can use the methods found in the Collection class Is a collection of graphics that are stored in the GraphicsLayer. It provides useful utility methods for working with items in the Collection, includingĪ Collection can be of any type. Collection stores an array of items of the same type.
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