28 lines
695 B
TypeScript
28 lines
695 B
TypeScript
/* tslint:disable use-pipe-transform-interface */
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// #docregion
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// #docregion pure
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import { Pipe, PipeTransform } from '@angular/core';
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import { Flyer } from './heroes';
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@Pipe({ name: 'flyingHeroes' })
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export class FlyingHeroesPipe implements PipeTransform {
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transform(allHeroes: Flyer[]) {
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// #docregion filter
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return allHeroes.filter(hero => hero.canFly);
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// #enddocregion filter
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}
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}
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// #enddocregion pure
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/////// Identical except for the pure flag
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// #docregion impure
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// #docregion pipe-decorator
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@Pipe({
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name: 'flyingHeroesImpure',
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pure: false
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})
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// #enddocregion pipe-decorator
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export class FlyingHeroesImpurePipe extends FlyingHeroesPipe {}
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// #enddocregion impure
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