// Write a class that represents a person. The class should take age, location, and name as inputs. The class should have methods to get each of these data points.
// Solution
class Person {
constructor(age, location, name) {
this.age = age;
this.name = name;
this.location = location;
}
getAge() {
return this.age;
}
getLocation() {
return this.location;
}
getName() {
return this.name;
}
}
//////////////////////////////////////////////////////////////////
// Write a class representing a database table/collection of persons. Your class should be able to allow the insertion, retrieving, updating, and deletion of persons.
// Solution
class PersonDatabase {
constructor() {
this.store = [];
}
delete(id) {
this.store = this.store.filter((person) => person.id !== id); // Could be optimized
}
get(query) {
return this.store.filter((person) => {
for (let key in query) {
if (!query.hasOwnProperty(key) || person[key] !== query[key]) {
return false;
}
}
return true;
})
.slice();
}
insert() {
[...arguments].forEach((person) => {
const id = date.now();
const personToStore = Object.assign({}, person, {id});
this.store.push(personToStore);
});
}
update(id, updates) {
const personToUpdate = this.store.find((person) => person.id === id);
const updatedPerson = Object.assign(personToUpdate, updates);
return Object.assign({}, updatedPerson);
}
}
no comments
sign in to comment