From ee042feb6811a2dfb7abc6e3ff5fdf4d1a53c9c3 Mon Sep 17 00:00:00 2001
From: ShyunnY <1147212064@qq.com>
Date: Sat, 26 Aug 2023 21:25:28 +0800
Subject: [PATCH] feat: add strings reverse and strings contain func in
 utils.strings file

---
 utils/strings.go      | 23 +++++++++++++++++++++++
 utils/strings_test.go | 32 ++++++++++++++++++++++++++++++++
 2 files changed, 55 insertions(+)

diff --git a/utils/strings.go b/utils/strings.go
index 109d132f1e..a8d833f2f8 100644
--- a/utils/strings.go
+++ b/utils/strings.go
@@ -73,3 +73,26 @@ func EqualFold(b, s string) bool {
 	}
 	return true
 }
+
+// Reverse reverse target string
+func Reverse(s string) string {
+	rs := []rune(s)
+
+	for head, tail := 0, len(rs)-1; head < tail; head, tail = head+1, tail-1 {
+		rs[head], rs[tail] = rs[tail], rs[head]
+	}
+
+	return string(rs)
+}
+
+// Contain checks if the target string is contained in the strs
+func Contain(strs []string, s string) bool {
+
+	for _, str := range strs {
+		if str == s {
+			return true
+		}
+	}
+
+	return false
+}
diff --git a/utils/strings_test.go b/utils/strings_test.go
index c0de5875c6..776748e6f9 100644
--- a/utils/strings_test.go
+++ b/utils/strings_test.go
@@ -215,3 +215,35 @@ func Test_EqualFold(t *testing.T) {
 	res = EqualFold("/MY4/NAME/IS/:PARAM/*", "/my4/nAME/IS/:param/*")
 	AssertEqual(t, true, res)
 }
+
+func Test_Reverse(t *testing.T) {
+	t.Parallel()
+
+	res := Reverse("abcde")
+	AssertEqual(t, "edcba", res)
+
+	res = Reverse("abcd")
+	AssertEqual(t, "dcba", res)
+
+	res = Reverse("a")
+	AssertEqual(t, "a", res)
+
+	res = Reverse("")
+	AssertEqual(t, "", res)
+}
+
+func Test_Contain(t *testing.T) {
+	t.Parallel()
+
+	res := Contain([]string{"a", "b", "c", "d"}, "b")
+	AssertEqual(t, true, res)
+
+	res = Contain([]string{"a,b,c,d"}, "e")
+	AssertEqual(t, false, res)
+
+	res = Contain([]string{}, "a")
+	AssertEqual(t, false, res)
+
+	res = Contain([]string{"a"}, "")
+	AssertEqual(t, false, res)
+}