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This is the archived documentation for Angular v17. Please visit angular.dev to see this page for the current version of Angular.

DefaultIterableDiffer

Deprecated: v4.0.0 - Should not be part of public API.

      
      class DefaultIterableDiffer<V> implements IterableDiffer<V>, IterableChanges<V> {
  constructor(trackByFn?: TrackByFunction<V>)
  length: number
  collection: V[] | Iterable<V> | null
  isDirty: boolean
forEachItem(fn: (record: IterableChangeRecord_<V>) => void)
forEachOperation(fn: (item: IterableChangeRecord<V>, previousIndex: number, currentIndex: number) => void)
forEachPreviousItem(fn: (record: IterableChangeRecord_<V>) => void)
forEachAddedItem(fn: (record: IterableChangeRecord_<V>) => void)
forEachMovedItem(fn: (record: IterableChangeRecord_<V>) => void)
forEachRemovedItem(fn: (record: IterableChangeRecord_<V>) => void)
forEachIdentityChange(fn: (record: IterableChangeRecord_<V>) => void)
diff(collection: NgIterable<V>): DefaultIterableDiffer<V> | null
onDestroy()
check(collection: NgIterable<V>): boolean }

Constructor

      
      constructor(trackByFn?: TrackByFunction<V>)
    
Parameters
trackByFn TrackByFunction<V>

Optional. Default is undefined.

Properties

Property Description
length: number Read-Only
collection: V[] | Iterable<V> | null Read-Only
isDirty: boolean Read-Only

Methods

      
      forEachItem(fn: (record: IterableChangeRecord_<V>) => void)
    
Parameters
fn (record: IterableChangeRecord_<V>) => void
      
      forEachOperation(fn: (item: IterableChangeRecord<V>, previousIndex: number, currentIndex: number) => void)
    
Parameters
fn (item: IterableChangeRecord<V>, previousIndex: number, currentIndex: number) => void
      
      forEachPreviousItem(fn: (record: IterableChangeRecord_<V>) => void)
    
Parameters
fn (record: IterableChangeRecord_<V>) => void
      
      forEachAddedItem(fn: (record: IterableChangeRecord_<V>) => void)
    
Parameters
fn (record: IterableChangeRecord_<V>) => void
      
      forEachMovedItem(fn: (record: IterableChangeRecord_<V>) => void)
    
Parameters
fn (record: IterableChangeRecord_<V>) => void
      
      forEachRemovedItem(fn: (record: IterableChangeRecord_<V>) => void)
    
Parameters
fn (record: IterableChangeRecord_<V>) => void
      
      forEachIdentityChange(fn: (record: IterableChangeRecord_<V>) => void)
    
Parameters
fn (record: IterableChangeRecord_<V>) => void
      
      diff(collection: NgIterable<V>): DefaultIterableDiffer<V> | null
    
Parameters
collection NgIterable<V>
Returns

DefaultIterableDiffer<V> | null

      
      onDestroy()
    
Parameters

There are no parameters.

      
      check(collection: NgIterable<V>): boolean
    
Parameters
collection NgIterable<V>
Returns

boolean