Learn how Python's dictionary data structure works as a powerful and versatile way to store and retrieve objects and data in your applications.

Mojo aims to be as easy to use as Python, but as powerful and fast as Rust. Here's a first look at Python's newest challenger.

DEF stands for diesel exhaust fluid, and it is mandatory for all semi-trucks to use it in the United States. Here's why and what exactly it does.

For most diesel-powered engines, DEF is vital so the vehicle performs at its best. Here's what it is exactly and what the acronym stands for.

Refilling DEF is part and parcel of owning a diesel. But what happens if you use expired DEF instead of fresh fluid? Here's what you should know.