From be942ec33e31eb1c3eb8d688184925ab3d3d28c2 Mon Sep 17 00:00:00 2001
From: dudaodong <lanliddd.2007@163.com>
Date: Wed, 30 Mar 2022 17:27:50 +0800
Subject: [PATCH] feat: add package maputil and Keys func

---
 maputil/map.go | 16 ++++++++++++++++
 1 file changed, 16 insertions(+)
 create mode 100644 maputil/map.go

diff --git a/maputil/map.go b/maputil/map.go
new file mode 100644
index 0000000..58ce4f2
--- /dev/null
+++ b/maputil/map.go
@@ -0,0 +1,16 @@
+// Copyright 2021 dudaodong@gmail.com. All rights reserved.
+// Use of this source code is governed by MIT license
+
+// Package maputil includes some functions to manipulate map.
+package maputil
+
+// Keys returns a slice of the map's keys
+func Keys[K comparable, V any](m map[K]V) []K {
+	keys := make([]K, len(m))
+
+	for k := range m {
+		keys = append(keys, k)
+	}
+
+	return keys
+}