Blog
Longer-form guides, deep dives and notes from the team — everything we learn while building a better way to learn to code.
How to Center an Image in CSS (5 Reliable Methods)
Learn how to center an image in CSS with margin, text-align, Flexbox, Grid, and absolute positioning, plus fixes for when centering silently fails.
How to Make an Image Link in HTML
Learn how to make an image link in HTML with the right <a> and structure, plus new-tab, accessibility, and troubleshooting fixes.</a>
How to Convert String to Int Java: parseInt(), valueOf() & More
Learn how to convert string to int Java the right way with parseInt(), valueOf(), radix conversion, and safe NumberFormatException handling.
How to Check if a String Contains a Word in Python
The direct way to check if a string contains a word in Python, plus whole-word matching, case-insensitive search, and finding word positions.
What Is WPF in C#? A Complete Guide to Windows Presentation Foundation
What is WPF in C#? A clear guide to Windows Presentation Foundation, how it works with C# and XAML, and whether it's worth learning in 2026.
How to Add an Image in HTML: The Complete img Tag Guide
Learn how to add image in HTML with the img tag, alt text, relative paths, srcset, and the picture element — plus common mistakes to avoid.
How to Center a Div in CSS
A practical guide to how to center a div in CSS across real scenarios, from full-page layouts to modals, plus fixes for when it won't work.