From b5efeb06422db5c7d4f6dfceb921b8abf204c0fd Mon Sep 17 00:00:00 2001
From: Fredrik Robertsen <fredrikr79@pm.me>
Date: Sat, 31 Jan 2026 12:03:35 +0100
Subject: [PATCH] implement swap_mutation

---
 src/main.odin | 11 +++++++++++
 1 file changed, 11 insertions(+)

diff --git a/src/main.odin b/src/main.odin
index 0d551a1..cfb579d 100644
--- a/src/main.odin
+++ b/src/main.odin
@@ -181,6 +181,17 @@ bit_flip_mutation :: proc(chrom: ^Chromosome, mutation_rate: f32 = 0.01) {
 	}
 }
 
+swap_mutation :: proc(chrom: ^Chromosome) {
+	idx1 := rand.int_max(NUMBER_OF_ITEMS)
+	idx2 := rand.int_max(NUMBER_OF_ITEMS)
+
+	bit1 := bit_array.get(chrom, idx1)
+	bit2 := bit_array.get(chrom, idx2)
+
+	bit_array.set(chrom, idx1, bit2)
+	bit_array.set(chrom, idx2, bit1)
+}
+
 main :: proc() {
 	items, ok := read_data(DATA_FILE)
 	if !ok {