angular pipes
//component.ts file:
import {Pipe, PipeTransform} from '@angular/core';
@Pipe ({
name : 'sqrt'
})
export class SqrtPipe implements PipeTransform {
transform(val : number) : number {
return Math.sqrt(val);
}
}
//import SqrtPipe inside your module.ts ,
import { SqrtPipe } from './app.sqrt';
declarations: [
SqrtPipe,
],
//then you can use this pipe in component.html file.
// <h2>Square root of 625 is: {{625 | sqrt}}</h2>use of pipe
import {Observable, range} from 'rxjs';
import {map, filter} from 'rxjs/operators';
const source$: Observable<number> = range(0, 10);
source$.pipe(
map(x => x * 2),
filter(x => x % 3 === 0)
).subscribe(x => console.log(x));Copyright © 2021 Codeinu
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