What are the differences between templates and generics?

What are the differences between templates and generics in programming?

Templates and generics are both ways to create reusable code, but they differ in syntax and usage. Templates are primarily used in C++ and allow for type parameters, while generics are used in languages like Java and C#.

Can you give me an example of each?

Sure! In C++, a template function might look like this: template <typename T> T add(T a, T b) { return a + b; }. In Java, a generic method would be: public <T> T add(T a, T b) { return a + b; }.

Are there any performance differences between them?

Yes, templates are resolved at compile time, which can lead to better performance in C++. Generics, on the other hand, may introduce some overhead due to type erasure in languages like Java.

Which one is more flexible?

Generics are generally considered more flexible because they allow for type constraints and can work with a wider range of data types, while templates can be more powerful in terms of metaprogramming.