Add examples

examples/yearbook/person.js

@@ -0,0 +1,31 @@
+export class Person {
+  /**
+   * A person in the yearbook.
+   * @param {string} firstName
+   * @param {string} lastName
+   * @param {string} dateOfBirth
+   */
+  constructor(firstName, lastName, dateOfBirth) {
+    this.firstName = firstName;
+    this.lastName = lastName;
+    this.dateOfBirth = dateOfBirth;
+  }
+
+  get fullName() {
+    return `${this.firstName} ${this.lastName}`;
+  }
+
+  get age() {
+    const today = new Date();
+    const birthDate = new Date(this.dateOfBirth);
+
+    let age = today.getFullYear() - birthDate.getFullYear();
+    const month = today.getMonth() - birthDate.getMonth();
+
+    if (month < 0 || (month === 0 && today.getDate() < birthDate.getDate())) {
+      age--;
+    }
+
+    return age;
+  }
+}