[아이오닉] filter

[young chol seo]

getContactsByCategory(category: string): Observable<Contact[]> {

return this.getContacts().pipe(map(contacts => contacts.filter(contact => contact.category == category)));

}

getContactById(id: number): Observable<Contact> {

return this.getContacts().pipe(map(contacts => contacts.find(contact => contact.id == id)));

}