commit e5df799c8cebc2ddf13a58888f7a4e73b6139ba3
Author: sre <sre@yangqiao.org>
Date:   Fri Jun 17 11:15:19 2022 +0800

    1st init

diff --git a/.gitignore b/.gitignore
new file mode 100644
index 0000000..6e6b069
--- /dev/null
+++ b/.gitignore
@@ -0,0 +1,2 @@
+.idea
+go.sum
\ No newline at end of file
diff --git a/go.mod b/go.mod
new file mode 100644
index 0000000..7bad27b
--- /dev/null
+++ b/go.mod
@@ -0,0 +1 @@
+module git.sre.ink/go/gtool
diff --git a/readme.md b/readme.md
new file mode 100644
index 0000000..3634033
--- /dev/null
+++ b/readme.md
@@ -0,0 +1,3 @@
+gtool
+=======
+Golang tool set
diff --git a/str/str.go b/str/str.go
new file mode 100644
index 0000000..bfcab1f
--- /dev/null
+++ b/str/str.go
@@ -0,0 +1,22 @@
+package str
+
+import "encoding/hex"
+
+type Str struct {
+}
+
+// struing to hex
+func HexEncode(str string) string {
+	byteStr := []byte(str)
+	return hex.EncodeToString(byteStr)
+}
+
+// hex to string
+func HexDecode(str string) (string, error) {
+	hexStr, err := hex.DecodeString(str)
+	if err != nil {
+		panic(err)
+		return "", err
+	}
+	return string(hexStr), nil
+}
diff --git a/str/str_test.go b/str/str_test.go
new file mode 100644
index 0000000..fa1355b
--- /dev/null
+++ b/str/str_test.go
@@ -0,0 +1,15 @@
+package str
+
+import (
+	"fmt"
+	"testing"
+)
+
+func TestHexEncode(t *testing.T) {
+	fmt.Println(HexEncode("hello world!"))
+	//68656c6c6f20776f726c6421
+}
+func TestHexDecode(t *testing.T) {
+	fmt.Println(HexDecode("68656c6c6f20776f726c6421"))
+	//hello world! <nil>
+}