RAII
RAII (Resource Acquisition Is Initialization) is a programming idiom used primarily in C++ and other languages with deterministic object lifetimes. It ties resource management (like memory, file handles, or locks) to object lifetime, ensuring resources are acquired during object construction and automatically released during destruction. This helps prevent resource leaks and simplifies error handling by leveraging the language's scoping rules.
Developers should learn RAII to write safer and more maintainable code in languages like C++, Rust, or D, where it's a core pattern for managing resources. It's essential for avoiding memory leaks, handling exceptions gracefully, and ensuring proper cleanup in scenarios like file I/O, network connections, or mutex locking, as it automates resource release even when errors occur.