| /** 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 |