doc/api/core/operators/manyselect.md
# This is RxJS v 4. [Find the latest version here](https://github.com/reactivex/rxjs)### `Rx.Observable.prototype.manySelect(selector, [scheduler])`### `Rx.Observable.prototype.extend(selector, [scheduler])`[Ⓢ](https://github.com/Reactive-Extensions/RxJS/blob/master/src/core/linq/observable/manyselect.js "View in source") Comonadic bind operator. #### Arguments1. `selector` *(`Function`)*: A transform function to apply to each element.2. `[scheduler=Rx.Scheduler.immediate]` *(`Scheduler`)*: Scheduler used to execute the operation. If not specified, defaults to the `Rx.Scheduler.immediate` scheduler. #### Returns*(`Observable`)*: An observable sequence which results from the comonadic bind operation. #### Example```jsvar source = Rx.Observable.range(0, 3) .manySelect(function (ys) { return ys.first(); }) .mergeAll(); var subscription = source.subscribe( function (x) { console.log('Next: ' + x); }, function (err) { console.log('Error: ' + err); }, function () { console.log('Completed'); }); // => Next: 0// => Next: 1// => Next: 2// => Completed``` ### Location File:- [`/src/core/linq/observable/manyselect.js`](https://github.com/Reactive-Extensions/RxJS/blob/master/src/core/linq/observable/manyselect.js) Dist:- [`rx.all.js`](https://github.com/Reactive-Extensions/RxJS/blob/master/dist/rx.all.js)- [`rx.all.compat.js`](https://github.com/Reactive-Extensions/RxJS/blob/master/dist/rx.all.compat.js)- [`rx.experimental.js`](https://github.com/Reactive-Extensions/RxJS/blob/master/dist/rx.experimental.js) Prerequisites:- [`rx.js`](https://github.com/Reactive-Extensions/RxJS/blob/master/dist/rx.js) | [`rx.compat.js`](https://github.com/Reactive-Extensions/RxJS/blob/master/dist/rx.compat.js) | [`rx.lite.js`](https://github.com/Reactive-Extensions/RxJS/blob/master/dist/rx.lite.js) | [`rx.lite.compat.js`](https://github.com/Reactive-Extensions/RxJS/blob/master/dist/rx.lite.compat.js) NPM Packages:- [`rx`](https://www.npmjs.org/package/rx) NuGet Packages:- [`RxJS-All`](http://www.nuget.org/packages/RxJS-All)- [`RxJS-Experimental`](http://www.nuget.org/packages/RxJS-Experimental) Unit Tests:- [`/tests/observable/manyselect.js`](https://github.com/Reactive-Extensions/RxJS/blob/master/tests/observable/manyselect.js)