"use strict"; Object.defineProperty(exports, "__esModule", { value: true }); var rxjs_1 = require("rxjs"); var internal_compatibility_1 = require("rxjs/internal-compatibility"); /* 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. * * 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. * * * * `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 Dynamically calculate the Body-Mass Index from an Observable of weight and one for height * 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 */ function combineLatest() { var observables = []; for (var _i = 0; _i < arguments.length; _i++) { observables[_i] = arguments[_i]; } var project = null; if (typeof observables[observables.length - 1] === 'function') { project = observables.pop(); } // if the first and only other argument besides the resultSelector is an array // assume it's been called with `combineLatest([obs1, obs2, obs3], project)` if (observables.length === 1 && internal_compatibility_1.isArray(observables[0])) { observables = observables[0].slice(); } return this.lift.call(rxjs_1.of.apply(void 0, [this].concat(observables)), new internal_compatibility_1.CombineLatestOperator(project)); } exports.combineLatest = combineLatest; //# sourceMappingURL=combineLatest.js.map