# Informal interfaces and abstract types

**URL:** <https://discourse.julialang.org/t/informal-interfaces-and-abstract-types/95993>\
**Category:** General Usage\
**Tags:** question, design-pattern\
**Created:** [March 13, 2023, 10:42am UTC](https://discourse.julialang.org/t/informal-interfaces-and-abstract-types/95993 "2023-03-13T10:42:10Z")\
**Posts on this page:** 1\
**Showing post:** 2

<div class="post-metadata">

**Author:** ![nolb](https://avatars.discourse-cdn.com/v4/letter/n/96bed5/32.png) [@nolb](https://discourse.julialang.org/u/nolb)\
**Post date:** [May 11, 2023, 8:57am UTC](https://discourse.julialang.org/t/informal-interfaces-and-abstract-types/95993/2 "2023-05-11T08:57:06Z")

</div>

I saw that a similar question has already been asked here: [Why use subtypes instead of traits and duck typing?](https://discourse.julialang.org/t/why-use-subtypes-instead-of-traits-and-duck-typing/59146)

---

_[View the full topic](https://discourse.julialang.org/t/informal-interfaces-and-abstract-types/95993)._