From 7c9789ad301fb6828ca45947107d43e7f982dee4 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Bogumi=C5=82=20Kami=C5=84ski?= <bkamins@sgh.waw.pl>
Date: Mon, 14 Feb 2022 17:51:24 +0100
Subject: [PATCH] update chapter 12

---
 ch12.jl | 6 +++---
 1 file changed, 3 insertions(+), 3 deletions(-)

diff --git a/ch12.jl b/ch12.jl
index 23002c2..70f08de 100644
--- a/ch12.jl
+++ b/ch12.jl
@@ -93,12 +93,12 @@ df
 
 # Codes for section 12.2
 
-# Code from listing 12.4
+# Code for listing 12.4
 
 using Graphs
 gh = SimpleGraph(nrow(classes_df))
-for (from, to) in eachrow(edges_df)
-    add_edge!(gh, from, to)
+for (src, dst) in eachrow(edges_df)
+    add_edge!(gh, src, dst)
 end
 gh
 ne(gh)