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<div class="content" data-ice="content"><h1 data-ice="title">es6/operator/concat.js</h1>
<pre class="source-code line-number raw-source-code"><code class="prettyprint linenums" data-ice="content">import { isScheduler } from '../util/isScheduler';
import { ArrayObservable } from '../observable/ArrayObservable';
import { MergeAllOperator } from './mergeAll';
/* tslint:disable:max-line-length */
export function concat() {
var observables = [];
for (var _i = 0; _i < arguments.length; _i++) {
observables[_i - 0] = arguments[_i];
}
return this.lift.call(concatStatic.apply(void 0, [this].concat(observables)));
}
/* tslint:enable:max-line-length */
/**
* Creates an output Observable which sequentially emits all values from every
* given input Observable after the current Observable.
*
* <span class="informal">Concatenates multiple Observables together by
* sequentially emitting their values, one Observable after the other.</span>
*
* <img src="./img/concat.png" width="100%">
*
* Joins multiple Observables together by subscribing to them one at a time and
* merging their results into the output Observable. Will wait for each
* Observable to complete before moving on to the next.
*
* @example <caption>Concatenate a timer counting from 0 to 3 with a synchronous sequence from 1 to 10</caption>
* var timer = Rx.Observable.interval(1000).take(4);
* var sequence = Rx.Observable.range(1, 10);
* var result = Rx.Observable.concat(timer, sequence);
* result.subscribe(x => console.log(x));
*
* @example <caption>Concatenate 3 Observables</caption>
* var timer1 = Rx.Observable.interval(1000).take(10);
* var timer2 = Rx.Observable.interval(2000).take(6);
* var timer3 = Rx.Observable.interval(500).take(10);
* var result = Rx.Observable.concat(timer1, timer2, timer3);
* result.subscribe(x => console.log(x));
*
* @see {@link concatAll}
* @see {@link concatMap}
* @see {@link concatMapTo}
*
* @param {Observable} input1 An input Observable to concatenate with others.
* @param {Observable} input2 An input Observable to concatenate with others.
* More than one input Observables may be given as argument.
* @param {Scheduler} [scheduler=null] An optional Scheduler to schedule each
* Observable subscription on.
* @return {Observable} All values of each passed Observable merged into a
* single Observable, in order, in serial fashion.
* @static true
* @name concat
* @owner Observable
*/
export function concatStatic() {
var observables = [];
for (var _i = 0; _i < arguments.length; _i++) {
observables[_i - 0] = arguments[_i];
}
var scheduler = null;
var args = observables;
if (isScheduler(args[observables.length - 1])) {
scheduler = args.pop();
}
if (scheduler === null && observables.length === 1) {
return observables[0];
}
return new ArrayObservable(observables, scheduler).lift(new MergeAllOperator(1));
}
//# sourceMappingURL=concat.js.map</code></pre>
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