---
title: "add unique to custom array · RUAL Documentation"
description: "push any given type to the array if it doesn't already exist."
canonical: https://docs.rual.nl/block-types/mutations/mutations_add_to_custom_array
language: en
---

# add unique to custom array

This block is part of the [`mutations`](https://docs.rual.nl/block-types/mutations) group and was last modified in core [`v10.4.28`](https://docs.rual.nl/core-versions/100428).

push any given type to the array if it doesn't already exist.

### Core Releases