> For the complete documentation index, see [llms.txt](https://chasethestar.gitbook.io/ko.learn-rxjs/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://chasethestar.gitbook.io/ko.learn-rxjs/rxjs/operators/combination/pairwise.md).

# pairwise

#### signature: `pairwise(): Observable<Array>`

## Emit the previous and current values as an array.

[![Ultimate RxJS](https://drive.google.com/uc?export=view\&id=1qq2-q-eVe-F_-d0eSvTyqaGRjpfLDdJz)](https://ultimatecourses.com/courses/rxjs?ref=4)

### Examples

**Example 1:**

( [StackBlitz](https://stackblitz.com/edit/typescript-tkuydr?file=index.ts\&devtoolsheight=50) | [jsBin](http://jsbin.com/keteyahido/1/edit?js,console) | [jsFiddle](https://jsfiddle.net/btroncone/8va47bq3/) )

```js
// RxJS v6+
import { pairwise, take } from 'rxjs/operators';
import { interval } from 'rxjs';

//Returns: [0,1], [1,2], [2,3], [3,4], [4,5]
interval(1000)
  .pipe(pairwise(), take(5))
  .subscribe(console.log);
```

### Additional Resources

* [pairwise](https://rxjs.dev/api/operators/pairwise) 📰 - Official docs

***

> 📁 Source Code: <https://github.com/ReactiveX/rxjs/blob/master/src/internal/operators/pairwise.ts>