lab11: impl

lab11/student.js

@@ -0,0 +1,59 @@
+/*
+Create a 'Student' constructor, like we did for Cat in class.
+It should have the following fields:
+*firstName
+*lastName
+*studentID
+*display -- A function that prints out the firstName, lastName, and studentID number.
+      To invoke it, you should call `student.display()`.
+
+Create an array of new students.
+Add a 'graduated' property to just one of your students.
+
+Now create another student **without** using the constructor.
+(In other words, use the object literal `{}` syntax).
+Set the prototype chain manually using the __proto__ field.
+Make sure the display method still works (without you having to add it to the object explicitly).
+*/
+
+// Create a Student constructor
+function Student(firstName, lastName, studentID) {
+  this.firstName = firstName;
+  this.lastName = lastName;
+  this.studentID = studentID;
+}
+
+// Add the display method to the prototype
+// Manual student doesn't work if display is defined in the constructor
+Student.prototype.display = function () {
+  console.log(`${this.firstName} ${this.lastName}, ID: ${this.studentID}`);
+};
+
+var students = [
+  new Student("John", "Smith", "12345"),
+  new Student("Jane", "Doe", "67890"),
+  new Student("Alice", "Johnson", "11111"),
+];
+
+// Add a 'graduated' property to just one of the students
+students[0].graduated = true;
+
+// Student without using the constructor (object literal syntax)
+var manualStudent = {
+  firstName: "Bob",
+  lastName: "Wilson",
+  studentID: "99999",
+  __proto__: Student.prototype,
+};
+
+// Test
+console.log("Students created with constructor:");
+students.forEach(function (student) {
+  student.display();
+  if (student.graduated) {
+    console.log("This student has graduated!");
+  }
+});
+
+console.log("\nManual student with prototype:");
+manualStudent.display();