let - 3

RxJS 5 let

by Brian Troncone

HTML

<script src="https://npmcdn.com/@reactivex/[email protected]/dist/global/Rx.umd.js"></script>

JavaScript

//emit array as a sequence
const source = Rx.Observable.from([1,2,3,4,5]);
 
//pass in your own function to add operators to observable
const obsArrayPlusYourOperators = (yourAppliedOperators) => {
  return source
    .map(val => val + 1)
    .let(yourAppliedOperators)
 };
const addTenThenTwenty = obs => obs.map(val => val + 10).map(val => val + 20);
const subscribe = obsArrayPlusYourOperators(addTenThenTwenty)
	//output: 32, 33, 34, 35, 36
	.subscribe(val => console.log('let FROM FUNCTION:', val));