javascript - 将可观察数组值累积到单个最终数组中

Question

如果我有 2 个 Observable 数组，x$ 和 y$:

let x = new BehaviorSubject([1,2,3])
let y = new BehaviorSubject([4,5,6])
let x$ = x.asObservable();
let y$ = y.asObservable();

我想累积成一个值数组，以便在订阅时发出[1,2,3,4,5,6]，我该如何实现？

Answer 1

Observable.combineLatest( x, y )
.map( ( [ x, y ] ) => ( [ ...x, ...y ] ) );