12345678910111213141516171819202122232425262728293031323334353637383940414243444546474849505152535455 |
- /** PURE_IMPORTS_START .._operators_combineLatest PURE_IMPORTS_END */
- import { combineLatest as higherOrder } from '../operators/combineLatest';
- /* tslint:enable:max-line-length */
- /**
- * Combines multiple Observables to create an Observable whose values are
- * calculated from the latest values of each of its input Observables.
- *
- * <span class="informal">Whenever any input Observable emits a value, it
- * computes a formula using the latest values from all the inputs, then emits
- * the output of that formula.</span>
- *
- * <img src="./img/combineLatest.png" width="100%">
- *
- * `combineLatest` combines the values from this Observable with values from
- * Observables passed as arguments. This is done by subscribing to each
- * Observable, in order, and collecting an array of each of the most recent
- * values any time any of the input Observables emits, then either taking that
- * array and passing it as arguments to an optional `project` function and
- * emitting the return value of that, or just emitting the array of recent
- * values directly if there is no `project` function.
- *
- * @example <caption>Dynamically calculate the Body-Mass Index from an Observable of weight and one for height</caption>
- * var weight = Rx.Observable.of(70, 72, 76, 79, 75);
- * var height = Rx.Observable.of(1.76, 1.77, 1.78);
- * var bmi = weight.combineLatest(height, (w, h) => w / (h * h));
- * bmi.subscribe(x => console.log('BMI is ' + x));
- *
- * // With output to console:
- * // BMI is 24.212293388429753
- * // BMI is 23.93948099205209
- * // BMI is 23.671253629592222
- *
- * @see {@link combineAll}
- * @see {@link merge}
- * @see {@link withLatestFrom}
- *
- * @param {ObservableInput} other An input Observable to combine with the source
- * Observable. More than one input Observables may be given as argument.
- * @param {function} [project] An optional function to project the values from
- * the combined latest values into a new value on the output Observable.
- * @return {Observable} An Observable of projected values from the most recent
- * values from each input Observable, or an array of the most recent values from
- * each input Observable.
- * @method combineLatest
- * @owner Observable
- */
- export function combineLatest() {
- var observables = [];
- for (var _i = 0; _i < arguments.length; _i++) {
- observables[_i - 0] = arguments[_i];
- }
- return higherOrder.apply(void 0, observables)(this);
- }
- //# sourceMappingURL=combineLatest.js.map
|