# Understanding generic functions and parametric types

**URL:** <https://discourse.julialang.org/t/understanding-generic-functions-and-parametric-types/117810>\
**Category:** New to Julia\
**Tags:** parametric-types, functions\
**Created:** [August 4, 2024, 3:13pm UTC](https://discourse.julialang.org/t/understanding-generic-functions-and-parametric-types/117810 "2024-08-04T15:13:00Z")\
**Posts on this page:** 1\
**Showing post:** 3

<div class="post-metadata">

**Author:** ![Oblomov](https://sea2.discourse-cdn.com/julialang/user_avatar/discourse.julialang.org/oblomov/32/211073_2.png) [@Oblomov](https://discourse.julialang.org/u/Oblomov)\
**Post date:** [August 4, 2024, 3:41pm UTC](https://discourse.julialang.org/t/understanding-generic-functions-and-parametric-types/117810/3 "2024-08-04T15:41:06Z")

</div>

Thank you very much!

I had already gone through the [Types](https://docs.julialang.org/en/v1/manual/types/) and [More about types](https://docs.julialang.org/en/v1/devdocs/types/) pages in the docs, but it’s a lot to digest, so I missed that particular aspect. The fact that when testing with tuples it hadn’t tripped didn’t help indeed 😉

I’ve gone with `AbstractVector{Tuple{M,String}} where M <: AbstractMatrix{<:Number}`, but now I’ve got a related problem for “diagonal types”, if my understanding is correct. I’ll open a new topic for it. Thanks again.

---

_[View the full topic](https://discourse.julialang.org/t/understanding-generic-functions-and-parametric-types/117810)._