Released: Dec 1, 2021

Updates in November 2021

Features

What's new in Java

• Added new Project:
  • Account Service (Beta).
• Added new Topics:
  • Working with data:
    • Thread-safe maps.
  • Spring Boot:
    • Getting authenticated user details.
    • IoC Container.

What's new in Python

• Added new Projects:
  • Recipe Builder API (Beta).
  • Opinion Detector (Beta).
  • Regex Tester (Beta).
• Added new Topics:
  • Django:
    • Django settings file.
  • Working with data:
    • Working with PDF in Python.
  • Code quality:
    • Intro to multithreading.
    • Timeit module.
    • How to improve code performance.
  • Additional instruments:
    • Archiving.
  • Python libraries:
    • Working with SQLite.

What's new in Kotlin

• Added new Project:
  • Indigo Card Game (Beta).
• Added new Topics:
  • Android:
    • Tasks and back stack.
  • Object-oriented programming:
    • Type Bounds.
  • Control flow:
    • Scopes.

What's new in Frontend

• Added new Project:
  • Hyperskill Cafe (Beta).
• Added new Topics:
  • CSS:
    • Media queries.
  • HTML:
    • Video.
  • JavaScript:
    • Array reducing.
    • Array transforming.
    • Object iterator.
    • React components.

What's new in Go

• Added new Topics:
  • Basics:
    • Introduction to Go.
    • Arithmetic operations.
    • Comments.
  • ​​Types and data structures:
    • Maps.
    • Operations with maps.
    • Primitive types.
    • String formatting.
  • Control flow:
    • Errors.
  • Working with data:
    • Reading files in Go.

What's new in Data science

• Added new Topics:
  • Handling missing values.
  • Train and test sets.
  • ID3 algorithm.
  • The Jaccard similarity index.
  • Introduction to matplotlib.
  • Matplotlib box plot.
  • Matplotlib bar chart.
  • Matplotlib pie chart.

What's new in Math

• Added new Topics:
  • Expected value of discrete random variable.
  • Continuous random variable.
  • Vector operations.
  • Limits of sequences.
  • Singular value decomposition.
  • Linear combinations and linear independence.
  • Vector dot product.
  • Vectors, matrices, scalars.

What's new in Fundamentals

• Added new Topics:
  • Databases and SQL:
    • Intro to MySQL.
    • Hierarchical database model.
    • String operations.
  • Dev tools:
    • Conditional statements and test checks in Bash.
    • Variables and aliases.
    • Homebrew package manager.
  • Essentials:
    • Introduction to API.
    • MVC.
    • Builder pattern.
    • Abstract factory.