Set a name rather than a number for ID:s returned as strings

Question

I've a function which returns a list of ID:s as strings. Now it prints out 1,2,3 etc

 

I would like to name each string rather than having it as numbers like:

1 == 'NameOne'

2 == 'NameTwo'

3 == 'NameThree'

 

x.component.ts 

printUser(ids: number[]): string {
    return ids.sort().join(', ');
}

 x.component.html.ts

<div *ngIf="x.users.length > 0"> User:
    {{ printUser(x.user) }}
</div>