C FFI
C FFI (Foreign Function Interface) is a mechanism that allows code written in one programming language to call functions or use data structures written in another language, typically C. It enables interoperability between languages by providing a way to interface with C libraries, which are widely used for system-level programming and performance-critical tasks. This is commonly implemented in languages like Python, Ruby, or Rust to leverage existing C code without rewriting it.
Developers should learn C FFI when they need to integrate high-performance C libraries into applications written in other languages, such as for numerical computing, graphics, or system utilities. It is essential for scenarios where reimplementing functionality in the host language would be inefficient or impractical, allowing reuse of mature C codebases while maintaining the productivity benefits of higher-level languages.