# Initialise array without specific types

**URL:** <https://discourse.julialang.org/t/initialise-array-without-specific-types/60204>\
**Category:** Performance\
**Tags:** question\
**Created:** [April 28, 2021, 9:30pm UTC](https://discourse.julialang.org/t/initialise-array-without-specific-types/60204 "2021-04-28T21:30:43Z")\
**Posts on this page:** 1\
**Showing post:** 4

<div class="post-metadata">

**Author:** ![Tamas\_Papp](https://sea2.discourse-cdn.com/julialang/user_avatar/discourse.julialang.org/tamas_papp/32/25949_2.png) [@Tamas\_Papp](https://discourse.julialang.org/u/Tamas_Papp)\
**Post date:** [April 29, 2021, 8:04am UTC](https://discourse.julialang.org/t/initialise-array-without-specific-types/60204/4 "2021-04-29T08:04:27Z")

</div>

> [@baptnz](#):
>
> they get in the way of automatic differentiation

The first thing I try in these situations is work around this by using a functional style (`mapreduce` etc) that figures out the type itself. But without an MWE it is hard to suggest something specific.

> [@Please read: make it easier to help you](https://discourse.julialang.org/t/psa-make-it-easier-to-help-you/14757):
>
> Welcome to the Julia Discourse! We are enthusiastic about helping Julia programmers, both beginner and experienced. This public service announcement (PSA) outlines best practices when asking for help. Following these points makes it easier for us to help you and more likely you’ll get a prompt, useful answer. Keywords are highlighted to make it easier to refer to specific points. Choose a descriptive title that captures the key part of your question, eg “plots with multiple axes” instead of …

---

_[View the full topic](https://discourse.julialang.org/t/initialise-array-without-specific-types/60204)._