partition - 2

RxJS 5 partition

by Brian Troncone

HTML

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

JavaScript

const source = Rx.Observable.from([1,2,3,4,5,6]);
//if greater than 3 throw
const example = source
  .map(val => {
    if(val > 3){
      throw `${val} greater than 3!`
    }
    return {success: val};
  })
  .catch(val => Rx.Observable.of({error: val}));
//split on success or error
const [success, error] = example.partition(res => res.success)
/*
  Output:
  "Success! 1"
  "Success! 2"
  "Success! 3"
  "Error! 4 greater than 3!"
*/
const subscribe = Rx.Observable.merge(
  success.map(val => `Success! ${val.success}`),
  error.map(val => `Error! ${val.error}`)
).subscribe(val => console.log(val));