From 9393f239f6426c8772bf7bd739df7b23f79f9f9d Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Bogumi=C5=82=20Kami=C5=84ski?= <bkamins@sgh.waw.pl>
Date: Fri, 27 May 2022 13:22:37 +0200
Subject: [PATCH] add example of mutating values in function

---
 ch02.jl | 8 ++++++++
 1 file changed, 8 insertions(+)

diff --git a/ch02.jl b/ch02.jl
index f04b07a..5b14dd4 100644
--- a/ch02.jl
+++ b/ch02.jl
@@ -218,6 +218,14 @@ end
 s
 s / length(y)
 
+function f!(x)
+    x[1] = 10
+    return x
+end
+x = [1, 2, 3]
+f!(x)
+x
+
 # Code for listing 2.7
 
 function times_two(x)