feat: add updated non_primitives.js file

Author: ExploitEngineer

part2 (Data Types and Primitives)/01_non_primitives.js

@@ -0,0 +1,40 @@
+// Non-Primitive Data Types in JavaScript
+// These are reference types — stored and compared by reference (memory address).
+
+// 1. Object
+const user = {
+  name: "Rafay",
+  age: 22,
+  isAdmin: false
+};
+
+console.log(typeof user);      // "object"
+console.log(user.name);        // "Rafay"
+
+// 2. Array (special type of object)
+const skills = ["HTML", "CSS", "JavaScript"];
+
+console.log(typeof skills);    // "object"
+console.log(skills[1]);        // "CSS"
+
+// 3. Function (also a type of object)
+function greet(name) {
+  return `Hello, ${name}!`;
+}
+
+console.log(typeof greet);     // "function"
+console.log(greet("Rafay"));   // "Hello, Rafay!"
+
+// 4. Date (built-in object)
+const today = new Date();
+
+console.log(typeof today);     // "object"
+console.log(today.toDateString()); // e.g., "Wed Jun 11 2025"
+
+// 5. Object Comparison (by reference)
+const obj1 = { a: 1 };
+const obj2 = { a: 1 };
+const obj3 = obj1;
+
+console.log(obj1 === obj2);    // false (different memory)
+console.log(obj1 === obj3);    // true (same reference)