Class Iterator

dw.util

Class Iterator

Object

dw.util.Iterator

The Iterator class allows you to access items in a collection.

All Known Subclasses

LoopIterator, SeekableIterator

This class does not have a constructor, so you cannot create it directly. To get an instance of this class, use one of the subclass constructors.

asList() : List

Convert the iterator into a list.

asList(start : Number, size : Number) : List

Converts a sub-sequence within the iterator into a list.

hasNext() : boolean

Indicates if there are more elements.

next() : Object

Returns the next element from the Iterator.

Methods inherited from class Object

assign, create, create, defineProperties, defineProperty, entries, freeze, fromEntries, getOwnPropertyDescriptor, getOwnPropertyNames, getOwnPropertySymbols, getPrototypeOf, hasOwnProperty, is, isExtensible, isFrozen, isPrototypeOf, isSealed, keys, preventExtensions, propertyIsEnumerable, seal, setPrototypeOf, toLocaleString, toString, valueOf, values

asList

asList() : List

Convert the iterator into a list. After this conversion the iterator is empty and hasNext() will always return false. Note: This method should be used with care. For example a large database result is pulled into memory completely with this method and can cause an OutOfMemory situation.

Returns:

the iterator as a list.

asList

asList(start : Number, size : Number) : List

Converts a sub-sequence within the iterator into a list. Note: This method should be used with care. For example a large database result is pulled into memory completely with this method and can cause an OutOfMemory situation.

Parameters:

start - the number of elements to iterate before adding elements to the sublist. Negative values are treated as 0.

size - the maximum number of elements to add to the sublist. Nonpositive values always result in empty list.

Returns:

a sub-sequence within the iterator into a list.

hasNext

hasNext() : boolean

Indicates if there are more elements.

Returns:

true if there are more elements, false otherwise.

next() : Object

Returns the next element from the Iterator.

Returns:

the next element from the Iterator.