Course/Module 4/Topic 3 of 3Intermediate

Functions & Generics - Practice

Put your functions & generics skills to the test with practical exercises and challenges.

50 min•By Priygop Team•Last updated: Feb 2026

Hands-On Practice

Practice makes perfect! In this section, you'll work through practical exercises that reinforce the concepts covered in this module.

Exercises

Exercise 1: Apply basic functions & generics concepts
Exercise 2: Solve intermediate-level challenges
Exercise 3: Build a mini-project using functions & generics
Exercise 4: Debug and fix common issues

Practice: Functions & Generics

Practice: Functions & GenericsJavaScript⚠ 1 error

⚠ Syntax Issues (1)

Line 1: JS Error: Unexpected token '<'

💡 Missing or extra {}()[] or operator near the error.

JavaScript Editor

✕ 1 errorTab = 2 spaces

// Create a generic Stack class
class Stack<T> {
  private items: T[] = [];
  
  push(item: T): void { this.items.push(item); }
  pop(): T | undefined { return this.items.pop(); }
  peek(): T | undefined { return this.items[this.items.length - 1]; }
  get size(): number { return this.items.length; }
}

const numberStack = new Stack<number>();
numberStack.push(10);
numberStack.push(20);
console.log("Top:", numberStack.peek());
console.log("Size:", numberStack.size);

Result

Click ▶ Run to see the result

Edit the code on the left, then click Run

JavaScript|15 lines|469 chars|1 error, 0 warnings

UTF-8

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