From f15e7175001915708cde2d567f1f2cfbe8e37133 Mon Sep 17 00:00:00 2001
From: Kayne Ruse <kayneruse@gmail.com>
Date: Mon, 6 Feb 2023 07:52:33 +1100
Subject: [PATCH] Update compound-library.md

---
 compound-library.md | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/compound-library.md b/compound-library.md
index 06c83de..058bc9d 100644
--- a/compound-library.md
+++ b/compound-library.md
@@ -10,6 +10,10 @@ The compound library can usually be accessed with the `import` keyword:
 import compound;
 ```
 
+## _concat(self, other)
+
+This function only works when self and other are matching compounds (both arrays, dictionaries or strings). It returns a new compound of that kind, with the content of `other` appended to the content of `self`.
+
 ## _getKeys(self: dictionary)
 
 This returns an array of all non-null keys stored within the dictionary. The order is undefined.