IT:AD:RXJS:HowTo

Foreach operates on each object (

Map operates on the whole array. In other words:

var src = [...];
var ids = src.map(x=>x.id);

is exactly the same as the longer approach of

var ids = [];src.forEach(x=>ids.push(x.id));
</sxh">
</callout>

Convert an array to an observable:

<sxh javascript>
let srcArray = ['foo', 'bar'];
let srcObservable = Rx.Observable.from(srcArray)

Perform an operation on every element within Observable array:

srcObservable.map(x => `Hello ${x}`);

Subscribe to observable:

srcObservable.subscribe(x => console.log(x) );
//The output will be:
// 'Hi foo'
// 'Hi bar'

## Resources ##

• https://egghead.io/lessons/javascript-introducing-the-observable