RustBrock/Generic Types Traits and Lifetimes.md

Generic Types, Traits, and Lifetimes

Generics

A tools for effectively handling the duplication of concepts.

One of these tools is generics

They are abstract stand-ins for concrete types or other properties

We can express the behavior of generics or how they relate to other generics without knowing what type that will be in place when compiling and running the code.

Functions can either take parameters of some generic type or a concrete type (like a i32 or String) in the same way they take parameters with unknown values to run the same code on multiple concrete values

One example where concrete values were already used was with Option<T>, Vec<T>, HashMap<K, V> and Result<T, E>

This chapter covers 3 things

1. Reducing Code duplication
2. Generics
3. Traits
4. Lifetimes