From f1be6a4a77cf8a6fffe4ecfb6a485590d8e19c81 Mon Sep 17 00:00:00 2001
From: Michael Bianco <iloveitaly@gmail.com>
Date: Thu, 14 Mar 2024 17:26:24 -0600
Subject: [PATCH] docs: uppercase ex with substring (#5056)

---
 docs/language/functions/upper.md | 10 ++++++++++
 1 file changed, 10 insertions(+)

diff --git a/docs/language/functions/upper.md b/docs/language/functions/upper.md
index 4a49fc6213..ae8a88e01a 100644
--- a/docs/language/functions/upper.md
+++ b/docs/language/functions/upper.md
@@ -22,3 +22,13 @@ echo '"Zed"' | zq -z 'yield upper(this)' -
 ```mdtest-output
 "ZED"
 ```
+
+[Slices](../expressions.md#slices) can be used to uppercase a subset of a string as well.
+
+```mdtest-command
+echo '"zed"' | zq -z 'func upper_first_char(str): (upper(str[0:1]) + str[1:]) yield upper_first_char(this)' -
+```
+=>
+```mdtest-output
+"Zed"
+```