wed
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Wed is a schema-aware editor for XML documents.
76 lines (73 loc) • 2.27 kB
JavaScript
define(function(require,exports,module){
import { Observable } from '../Observable';
import { Subscription } from '../Subscription';
/**
* Convert an object into an observable sequence of [key, value] pairs
* using an optional IScheduler to enumerate the object.
*
* @example <caption>Converts a javascript object to an Observable</caption>
* var obj = {
* foo: 42,
* bar: 56,
* baz: 78
* };
*
* var source = Rx.Observable.pairs(obj);
*
* var subscription = source.subscribe(
* function (x) {
* console.log('Next: %s', x);
* },
* function (err) {
* console.log('Error: %s', err);
* },
* function () {
* console.log('Completed');
* });
*
* @param {Object} obj The object to inspect and turn into an
* Observable sequence.
* @param {Scheduler} [scheduler] An optional IScheduler to run the
* enumeration of the input sequence on.
* @returns {(Observable<[string, T]>)} An observable sequence of
* [key, value] pairs from the object.
*/
export function pairs(obj, scheduler) {
if (!scheduler) {
return new Observable(subscriber => {
const keys = Object.keys(obj);
for (let i = 0; i < keys.length && !subscriber.closed; i++) {
const key = keys[i];
if (obj.hasOwnProperty(key)) {
subscriber.next([key, obj[key]]);
}
}
subscriber.complete();
});
}
else {
return new Observable(subscriber => {
const keys = Object.keys(obj);
const subscription = new Subscription();
subscription.add(scheduler.schedule(dispatch, 0, { keys, index: 0, subscriber, subscription, obj }));
return subscription;
});
}
}
/** @internal */
export function dispatch(state) {
const { keys, index, subscriber, subscription, obj } = state;
if (!subscriber.closed) {
if (index < keys.length) {
const key = keys[index];
subscriber.next([key, obj[key]]);
subscription.add(this.schedule({ keys, index: index + 1, subscriber, subscription, obj }));
}
else {
subscriber.complete();
}
}
}
//# sourceMappingURL=pairs.js.map
return module.exports;
});