import { Pipe , PipeTransform } from '@angular/core' ; @ Pipe ( { name : 'multTable' , } ) export class MultTablePipe implements PipeTransform { transform ( _ , digit , limit ) { if ( ! digit || ! limit ) { return [ ] ; } return new Array ( Math . floor ( limit ) ) . fill ( 0 ) . map ( ( _ , index ) => { return `${ digit } * ${ index + 1 } = ${ digit * ( index + 1 ) }` ; } ) ; } }