<span *ngFor="let category of categories" class="badge badge-primary category">{{ category }}</span>
<span *ngFor="let language of languages" class="badge badge-secondary language">{{ language }}</span>
<span *ngFor="let category of categories" class="badge badge-primary category">{{ category }}</span>
<span *ngFor="let language of languages" class="badge badge-secondary language">{{ language }}</span>