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observables.html
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<!DOCTYPE html>
<html>
<head>
<meta http-equiv="Content-Style-Type" content="text/css" />
<title>observables.html</title>
<link href="/library/skin/tool_base.css" type="text/css" rel="stylesheet" media="all" />
<link href="/library/skin/morpheus-default/tool.css" type="text/css" rel="stylesheet" media="all" />
<script type="text/javascript" src="/library/js/headscripts.js"></script>
<style>body { padding: 5px !important; }</style>
</head>
<body>
<script src="https://unpkg.com/rxjs/bundles/rxjs.umd.min.js"></script>
<!-- <p>paragraph</p> -->
<script>
// const { Observable, of, from } = rxjs;
// const { map, filter } = rxjs.operators;
// var obs = Observable.create(function (observer) {
// for (let i = 0; i < 100; i++) {
// observer.next(i);
// }
// observer.next('CS572');
// setTimeout(() => {
// observer.next('CS472');
// observer.error('Something went Wrong')
// observer.complete();
// }, 3000);
// });
// var subscription = obs.subscribe(
// function (x) { console.log(`Value: ${x}`); },
// function (err) { console.error(err); },
// function () { console.info(`Done`); });
/////////////////////
// of(1, 2, 3)
// .pipe(
// map((n) => n + 3),
// filter((n) => n >= 2)
// )
// .subscribe(
// (x) => console.log(x),
// null,
// () => console.log('done')
// );
//////////////////////
// const data = [
// { id: 0, name: 'Learning Node', topic: 'Node JS', },
// { id: 1, name: 'Learning MongoDB', topic: 'MongoDB', },
// { id: 2, name: 'Learning TypeScript', topic: 'TypeScript', }]
// from(data)
// .pipe(
// map((obj) => ({ msg: `${obj.name} is awesome!` }))
// )
// .subscribe((obj) => console.log(obj.msg))
/////////
// const { fromEvent } = rxjs;
// const obs = fromEvent(document, 'click');
// obs.subscribe((e) => console.log(e));
// obs.subscribe((e) => console.log(e.target));
//////////////
// let myPromise = new Promise((resolve, reject) => {
// setTimeout(function () { resolve("Success!"); }, 2000);
// });
// // myPromise.then((e) => console.log(e))
// from(myPromise).subscribe((e) => console.log(e), null,
// () => console.log('Finish'));
///////////////////
// const { range } = rxjs;
// range(1, 20)
// .pipe(
// filter(x => x % 2 === 1),
// map(x => x + x)
// )
// .subscribe(x => console.log(x));
/////////////
// const { Subject } = rxjs;
// var myObservable = new Subject();
// myObservable.subscribe(value => console.log(value));
// setTimeout(() => { myObservable.next('CS572'); }, 3000);
</script>
<!--
<button>Click me</button>
<div></div> -->
<script>
// var button = document.querySelector('button');
// var div = document.querySelector('div');
// const { Subject, BehaviorSubject } = rxjs;
// var myObservable = new BehaviorSubject('Not clicked');
// // var myObservable = new Subject();
// myObservable.subscribe((value) => div.textContent = value);
// button.addEventListener('click', () => myObservable.next('Clicked!'));
</script>
<!-- <input/> -->
<script>
// const { fromEvent } = rxjs;
// const { map, throttleTime, debounceTime, take, pluck } = rxjs.operators;
// var input = fromEvent(document.querySelector('input'), 'input');
// input
// .pipe(
// map(d => d.data),
// map(d => d.toUpperCase())
// )
// .subscribe((e) => console.log(e))
// input
// .pipe(
// // sleep for 200 ms and emit one value after that, sleep again
// throttleTime(1000),
// map(event => event.target.value)
// )
// .subscribe(value => console.log(value));
// input
// .pipe(
// // When no more events coming into the observable for 200ms => Emit the value
// // debounceTime(300),
// // map(event => event.target.value),
// pluck('target', 'value'),
// take(3)
// )
// .subscribe(value => console.log(`Check if user exists: ${value}`));
</script>
<script>
const { interval, of } = rxjs;
const { map, flatMap, mergeAll, take } = rxjs.operators;
interval(100) // ms
.pipe(
take(10),
// map(() => of(1, 2, 3)),
// mergeAll()
flatMap(x => of(1, 2, 3)),
)
.subscribe(x => console.log(x));
</script>
</body>
</html>