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API > @angular/core

DefaultIterableDiffer

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

v4.0.0-不应成为公共 API 的一部分。

      
      class DefaultIterableDiffer<V> implements IterableDiffer, IterableChanges {
  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
}

构造函数

      
      constructor(trackByFn?: TrackByFunction<V>)
参数
trackByFn TrackByFunction
可选. 默认值是 `undefined`.

属性

属性说明
length: number只读
collection: V[] | Iterable<V> | null只读
isDirty: boolean只读

方法

forEachItem() 

      
      forEachItem(fn: (record: IterableChangeRecord_<V>) => void)
参数
fn (record: IterableChangeRecord_) => void

forEachOperation() 

      
      forEachOperation(fn: (item: IterableChangeRecord<V>, previousIndex: number, currentIndex: number) => void)
参数
fn (item: IterableChangeRecord, previousIndex: number, currentIndex: number) => void

forEachPreviousItem() 

      
      forEachPreviousItem(fn: (record: IterableChangeRecord_<V>) => void)
参数
fn (record: IterableChangeRecord_) => void

forEachAddedItem() 

      
      forEachAddedItem(fn: (record: IterableChangeRecord_<V>) => void)
参数
fn (record: IterableChangeRecord_) => void

forEachMovedItem() 

      
      forEachMovedItem(fn: (record: IterableChangeRecord_<V>) => void)
参数
fn (record: IterableChangeRecord_) => void

forEachRemovedItem() 

      
      forEachRemovedItem(fn: (record: IterableChangeRecord_<V>) => void)
参数
fn (record: IterableChangeRecord_) => void

forEachIdentityChange() 

      
      forEachIdentityChange(fn: (record: IterableChangeRecord_<V>) => void)
参数
fn (record: IterableChangeRecord_) => void

diff() 

      
      diff(collection: NgIterable<V>): DefaultIterableDiffer<V> | null
参数
collection NgIterable
返回值

DefaultIterableDiffer<V> | null

onDestroy() 

      
      onDestroy()
参数

没有参数。

check() 

      
      check(collection: NgIterable<V>): boolean
参数
collection NgIterable
返回值

boolean