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openstapps/frontend/app/src/app/util/nullish-coalecing.pipe.ts

35 lines
1023 B
TypeScript

/*
* Copyright (C) 2021 StApps
* This program is free software: you can redistribute it and/or modify it
* under the terms of the GNU General Public License as published by the Free
* Software Foundation, version 3.
*
* This program is distributed in the hope that it will be useful, but WITHOUT
* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
* more details.
*
* You should have received a copy of the GNU General Public License along with
* this program. If not, see <https://www.gnu.org/licenses/>.
*/
import {Injectable, Pipe, PipeTransform} from '@angular/core';
/**
* Get the last value of an array
*/
@Injectable()
@Pipe({
name: 'nullishCoalesce',
pure: true,
})
export class NullishCoalescingPipe implements PipeTransform {
/**
* Transform
*/
// tslint:disable-next-line:prefer-function-over-method
transform<T, G>(value: T, fallback: G): T | G {
return value ?? fallback;
}
}