From 6fcfff6744ed197aca95188435bb4e83475d37f9 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?=E5=BE=90=E6=B6=9B?= <midnite@outlook.com>
Date: Fri, 19 Aug 2022 23:24:09 +0800
Subject: [PATCH] =?UTF-8?q?feat(utils):=E5=A2=9E=E5=8A=A0=E4=B8=80?=
 =?UTF-8?q?=E4=B8=AA=E5=B8=A6=E7=B4=A2=E5=BC=95=E7=9A=84Reduce=E5=87=BD?=
 =?UTF-8?q?=E6=95=B0=E3=80=82?=
MIME-Version: 1.0
Content-Type: text/plain; charset=UTF-8
Content-Transfer-Encoding: 8bit

---
 utils/functional.go | 8 ++++++++
 1 file changed, 8 insertions(+)

diff --git a/utils/functional.go b/utils/functional.go
index c8f69fd..f61dae2 100644
--- a/utils/functional.go
+++ b/utils/functional.go
@@ -16,6 +16,14 @@ func Reduce[S, T any](source []S, initialValue T, f func(T, S) T) T {
 	return acc
 }
 
+func ReduceIndexed[S, T any](source []S, initialValue T, f func(T, S, int, []S) T) T {
+	acc := initialValue
+	for index, elem := range source {
+		acc = f(acc, elem, index, source[:])
+	}
+	return acc
+}
+
 func Filter[T any](source []T, f func(T) bool) []T {
 	var dest []T
 	for _, elem := range source {