// ticker$ will update every 3s
// showHand$ will only triger after user click button
// I would like to take last ticker price as user order price when user click button
let lastPrice: number;
我需要依次运行两个可观察对象并仅返回第一个可观察对象的结果。第二个观察者需要首先在跑步之前完成。 我发现了一种解决方法,但我并不满意。你可以在这里进行测试:plunker test const first = Observable.of(10).delay(1000).do(res => console.log('first'));
const second = Observable.of(20