From f632695ef689f2d7b45193c4acbeb1803ee54b50 Mon Sep 17 00:00:00 2001
From: kojix2 <2xijok@gmail.com>
Date: Sun, 15 Mar 2026 22:50:18 +0900
Subject: [PATCH 1/2] test: Add complex number support to Array#sum

---
 spec/array_spec.rb | 6 ++++++
 1 file changed, 6 insertions(+)

diff --git a/spec/array_spec.rb b/spec/array_spec.rb
index 3759a6a..0a580b6 100644
--- a/spec/array_spec.rb
+++ b/spec/array_spec.rb
@@ -3,6 +3,12 @@
 require 'delegate'
 
 RSpec.describe Array do
+  describe '#sum' do
+    it 'sums with a complex init' do
+      expect([1, 2, 3].sum(Complex(1, 2))).to eq(Complex(7, 2))
+    end
+  end
+
   describe '#mean' do
     let(:ary) { [] }
     let(:block) { nil }

From ea716d877ad356b5264e7a5b0935fd22111331f0 Mon Sep 17 00:00:00 2001
From: kojix2 <2xijok@gmail.com>
Date: Sun, 15 Mar 2026 22:58:10 +0900
Subject: [PATCH 2/2] Correct complex addition logic in complex_add function

---
 ext/enumerable/statistics/extension/statistics.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/ext/enumerable/statistics/extension/statistics.c b/ext/enumerable/statistics/extension/statistics.c
index 3006fdf..df93548 100644
--- a/ext/enumerable/statistics/extension/statistics.c
+++ b/ext/enumerable/statistics/extension/statistics.c
@@ -163,7 +163,7 @@ complex_add(VALUE self, VALUE other)
 
     real = f_add(RCOMPLEX(self)->real, other);
 
-    return complex_new(CLASS_OF(self), real, RCOMPLEX(other)->imag);
+    return complex_new(CLASS_OF(self), real, RCOMPLEX(self)->imag);
   }
   return rb_num_coerce_bin(self, other, idPLUS);
 }