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pairwise

signature: pairwise(): Observable<Array>

Emit the previous and current values as an array.

Examples

Example 1:
// 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

Last modified 2yr ago