ToArray Pipe for Angular2

pipes.toarray.ts

import { Pipe, PipeTransform } from '@angular/core';

@Pipe({name: 'toArray'})
export class ToArray implements PipeTransform {
  transform(value: number, exponent: string[]): number {
    let res = [];
    for (let i = 1; i <= value; i++) {
        res.push(i);
    }
    return res;
  }
}