implement bit_flip_mutation

src/main.odin

@@ -172,6 +172,15 @@ uniform_crossover :: proc(
 	return
 }
 
+bit_flip_mutation :: proc(chrom: ^Chromosome, mutation_rate: f32 = 0.01) {
+	for i in 0 ..< NUMBER_OF_ITEMS {
+		if rand.float32() < mutation_rate {
+			current := bit_array.get(chrom, i)
+			bit_array.set(chrom, i, !current)
+		}
+	}
+}
+
 main :: proc() {
 	items, ok := read_data(DATA_FILE)
 	if !ok {