定义可能未定义的接口的最佳方法是什么?我有这个。我正在寻找替代方案。如果可能的话,更优雅简洁。
interface RouteInterface {
path: string;
test: boolean;
}
type TypeOrUndefined<T> = T | undefined;
这是我的使用方式:
const returnObj: TypeOrUndefined<RouteInterface> =
redirectChoices.find(
(option: RouteInterface) => option.test
);
答案 0 :(得分:3)
通常我个人都是这样:
adb shell sendevent /dev/input/event6 3 53 935
adb shell sendevent /dev/input/event6 0 0 0
adb shell sendevent /dev/input/event6 3 54 500
adb shell sendevent /dev/input/event6 0 0 0
adb shell sendevent /dev/input/event6 3 57 1
adb shell sendevent /dev/input/event6 0 0 0
adb shell sendevent /dev/input/event6 3 53 789
adb shell sendevent /dev/input/event6 0 0 0
adb shell sendevent /dev/input/event6 3 54 500
adb shell sendevent /dev/input/event6 0 0 0
adb shell sendevent /dev/input/event6 3 57 0
adb shell sendevent /dev/input/event6 0 0 0
这个特殊的代码也可以这样写:
const returnObj: RouteInterface | undefined =
redirectChoices.find(
(option: RouteInterface) => option.test
);
const returnObj =
redirectChoices.find(
(option: RouteInterface) => option.test
);
仍为returnObj
,因为RouteInterface | undefined
返回了包含Array.prototype.find
的并集。