Rx.Observable.prototype.concatMapObserver(onNext, onError, onCompleted, [thisArg])
Rx.Observable.prototype.selectConcatObserver(onNext, onError, onCompleted, [thisArg])
Projects each notification of an observable sequence to an observable sequence and concats the resulting observable sequences into one observable sequence.
Arguments
onNext
(Function
): A transform function to apply to each element. The selector is called with the following information:- the value of the element
- the index of the element
onError
(Function
): A transform function to apply when an error occurs in the source sequence.onCompleted
(Function
): A transform function to apply when the end of the source sequence is reached.[thisArg]
(Any
): Object to use asthis
when executing the transform functions.
Returns
(Observable
): An observable sequence whose elements are the result of invoking the one-to-many transform function corresponding to each notification in the input sequence.
Example
var source = Rx.Observable.range(1, 3)
.concatMapObserver(
function (x, i) {
return Rx.Observable.repeat(x, i);
},
function (err) {
return Rx.Observable.return(42);
},
function () {
return Rx.Observable.empty();
});
var subscription = source.subscribe(
function (x) {
console.log('Next: ' + x);
},
function (err) {
console.log('Error: ' + err);
},
function () {
console.log('Completed');
});
// => Next: 2
// => Next: 3
// => Next: 3
// => Completed
Location
File:
Dist:
NPM Packages:
NuGet Packages:
Unit Tests: