HarmonyOS ArkTS如何判断Object类型？

Question

如题：HarmonyOS ArkTS如何判断Object类型？

Answer 1

可以通过instanceof来判断实体类型，Demo如下示例：

@Entry
@Component
struct TestPage1 {
  @State list :Array<Object> = [new Cat(), new Dog()]

  build() {
    Row() {
      Column() {
        ForEach(this.list,(item:Object) => {
          if (item instanceof Cat) {
            Text("this is Cat")
          } else if (item instanceof Dog){
            Text("this is Dog")
          }
        })
      }
      .width('100%')
    }
    .height('100%')
  }
}

class Cat{}
class Dog{}