TypeScript ObservableArray.push方法代码示例

 private initDataItems() {
     this._sourceDataItems = new ObservableArray<DataItem>();
     for (let i = 0; i < posts.names.length; i++) {
         if (androidApplication) {
             this._sourceDataItems.push(new DataItem(i, posts.names[i], "This is item description", posts.titles[i], posts.text[i], "res://" + posts.images[i].toLowerCase()));
         }
         else {
             this._sourceDataItems.push(new DataItem(i, posts.names[i], "This is item description", posts.titles[i], posts.text[i], "res://" + posts.images[i]));
         }
     }
 }

 get items(): ObservableArray<Item> {
   this._items = new ObservableArray<Item>();
   for (let i = 0; i < 100; i++){
     this._items.push(new Item(`Item`, i));
   }
   return this._items;
 }

            onDiscovered: (peripheral: any) => {
                // peripherals.push(observable.fromObject(peripheral));
                console.log('peripheral', JSON.stringify(peripheral));
                this.peripherals.push(observable.fromObject(peripheral));

                console.log('Size: ', this.peripherals.length);
            }

export const test_ObservableArray_pushShouldAppendNewElementsFromSourceArray = function () {
    // >> observable-array-push-source
    const array = new ObservableArray([1, 2, 3]);
    // >> (hide)
    const viewBase = new Label();
    viewBase.set("testProperty", 0);
    viewBase.bind({ sourceProperty: "length", targetProperty: "testProperty" }, array);
    // << (hide)
    const result = array.push([4, 5, 6]);
    // << observable-array-push-source
    TKUnit.assert(result === 6 && array.getItem(5) === 6, "ObservableArray push() should append new elements from source array!");
    TKUnit.assert(viewBase.get("testProperty") === array.length, "Expected: " + array.length + ", Actual: " + viewBase.get("testProperty"));
};

 public onAddItemClick() {
     const id = Math.round(Math.random() * 100);
     this._dataItems.push(new DataItem(id, "This is a new item: " + id, "This is the new item's description."));
 }

 private addItemsToSourceDataItems(size: number) {
     for (let i = 0; i < size; i++) {
         this._sourceDataItems.push(this.getNextItemFromServer());
     }
 }