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Cómo mostrar el valor separado por comas de una matriz de objetos

Estoy tratando de mostrar la clave de objeto de la matriz separada por comas, pero obtengo una comma(,) al comenzar.

 getSeperatedByCommaName(): string { let finalName = ''; this.options.Ids.forEach((value) => { finalName = finalName + ',' + value.Name; }) return finalName; }

¿Estoy haciendo algo mal? ¿O hay alguna forma de mostrar directamente separados por comas en html sin escribir la función anterior?

Gracias por adelantado

about 4 years ago · Juan Pablo Isaza
2 answers
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0

Utilice el método de unión:

 let commaSeparatedNames = this.options.Ids.map(itm => itm.Name).join(',');
about 4 years ago · Juan Pablo Isaza Report

0

Modo normal: Demostración

 get seperatedByCommaName(): string { return this.options.Ids.map(value => value.Name).join(","); }

En plantilla:

 <p>{{ seperatedByCommaName }}</p>

Otra forma de usar la tubería: Demostración

 import { Pipe, PipeTransform } from '@angular/core'; @Pipe({ name: 'join' }) export class JoinPipe implements PipeTransform { transform(input: Array<any>, sep = ', '): string { return input.map(value => value.Name).join(sep); } }

No olvide declarar JoinPipe en el módulo como:

 @NgModule({ imports: [], declarations: [ JoinPipe ], exports: [ JoinPipe // if to be made available outside modules ] })

En Plantilla

 <p> {{ options.Ids | join }} </p>
about 4 years ago · Juan Pablo Isaza Report
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