2
1)下面的代码接受或者X和Y调用一些服务,推动值obeservable
2)当我们给invaild输入即X,Y必须给空结果和obeservable必须是空的,我不得不抛出一些警报输入
3)所以我如何检查这种情况?如何检查在rxjs可观察到数组的长度
我试过isEmpty功能,它不工作请帮助我吗?
const gridDataLoadRequest = GridDataLoadRequest
.withLatestFrom(filterParams)
.map(_.last);
return gridDataLoadRequest
.map(partitionedCodesToSearchParams)
.flatMap((vals) => {
let [ X, Y ] = vals;
let A = _.isEmpty(X.codes)
? Observable.of([])
: storePlanningService.searchCustomerChoices(X);
let B = _.isEmpty(Y.codes)
? Observable.of([])
: storePlanningService.searchCustomerChoices(Y);
return Observable.zip(A, B).map(_.flatten);
})
.publishReplay(1)
.refCount();
};