diff --git a/convertor/convertor_example_test.go b/convertor/convertor_example_test.go
index 10c2fe2..6fd7a09 100644
--- a/convertor/convertor_example_test.go
+++ b/convertor/convertor_example_test.go
@@ -242,7 +242,10 @@ func ExampleEncodeByte() {
 func ExampleDecodeByte() {
 	var obj string
 	byteData := []byte{6, 12, 0, 3, 97, 98, 99}
-	DecodeByte(byteData, &obj)
+	err := DecodeByte(byteData, &obj)
+	if err != nil {
+		return
+	}
 
 	fmt.Println(obj)
 
diff --git a/docs/slice_zh-CN.md b/docs/slice_zh-CN.md
index b9ab2f1..a3eb098 100644
--- a/docs/slice_zh-CN.md
+++ b/docs/slice_zh-CN.md
@@ -1442,7 +1442,7 @@ func main() {
 
 ### <span id="Union">Union</span>
 
-<p>合并多个切片.</p>
+<p>合并多个切片</p>
 
 <b>函数签名:</b>
 
diff --git a/fileutil/file_example_test.go b/fileutil/file_example_test.go
index 273df92..80802aa 100644
--- a/fileutil/file_example_test.go
+++ b/fileutil/file_example_test.go
@@ -43,7 +43,10 @@ func ExampleCreateDir() {
 
 	result1 := IsExist(dirPath)
 
-	CreateDir(dirPath)
+	err := CreateDir(dirPath)
+	if err != nil {
+		return
+	}
 
 	result2 := IsExist(dirPath)
 
@@ -75,8 +78,10 @@ func ExampleRemoveFile() {
 	CreateFile(srcFile)
 
 	copyFile := "./text_copy.txt"
-	CopyFile(srcFile, copyFile)
-
+	err := CopyFile(srcFile, copyFile)
+	if err != nil {
+		return
+	}
 	file, err := os.Open(copyFile)
 	if err != nil {
 		return
@@ -102,7 +107,10 @@ func ExampleReadFileToString() {
 	f, _ := os.OpenFile(fname, os.O_WRONLY|os.O_TRUNC, 0777)
 	defer f.Close()
 
-	f.WriteString("hello world")
+	_, err := f.WriteString("hello world")
+	if err != nil {
+		return
+	}
 
 	content, _ := ReadFileToString(fname)
 
@@ -121,12 +129,17 @@ func ExampleClearFile() {
 	f, _ := os.OpenFile(fname, os.O_WRONLY|os.O_TRUNC, 0777)
 	defer f.Close()
 
-	f.WriteString("hello world")
+	_, err := f.WriteString("hello world")
+	if err != nil {
+		return
+	}
 
 	content1, _ := ReadFileToString(fname)
 
-	ClearFile(fname)
-
+	err = ClearFile(fname)
+	if err != nil {
+		return
+	}
 	content2, _ := ReadFileToString(fname)
 
 	os.Remove(fname)
@@ -146,7 +159,10 @@ func ExampleReadFileByLine() {
 	f, _ := os.OpenFile(fname, os.O_WRONLY|os.O_TRUNC, 0777)
 	defer f.Close()
 
-	f.WriteString("hello\nworld")
+	_, err := f.WriteString("hello\nworld")
+	if err != nil {
+		return
+	}
 
 	content, _ := ReadFileByLine(fname)
 
@@ -171,7 +187,10 @@ func ExampleZip() {
 	CreateFile(srcFile)
 
 	zipFile := "./test.zip"
-	Zip(srcFile, zipFile)
+	err := Zip(srcFile, zipFile)
+	if err != nil {
+		return
+	}
 
 	result := IsExist(zipFile)
 
@@ -187,7 +206,11 @@ func ExampleZip() {
 func ExampleUnZip() {
 	fname := "./test.txt"
 	file, _ := os.Create(fname)
-	file.WriteString("hello world")
+
+	_, err := file.WriteString("hello\nworld")
+	if err != nil {
+		return
+	}
 
 	f, _ := os.Open(fname)
 	defer f.Close()
diff --git a/slice/slice_example_test.go b/slice/slice_example_test.go
index d22412c..930001d 100644
--- a/slice/slice_example_test.go
+++ b/slice/slice_example_test.go
@@ -664,7 +664,10 @@ func ExampleSortByField() {
 		{Name: "b", Age: 15},
 		{Name: "c", Age: 100}}
 
-	SortByField(users, "Age", "desc")
+	err := SortByField(users, "Age", "desc")
+	if err != nil {
+		return
+	}
 
 	fmt.Println(users)
 
diff --git a/system/os_example_test.go b/system/os_example_test.go
index 26da4df..164d1f8 100644
--- a/system/os_example_test.go
+++ b/system/os_example_test.go
@@ -44,7 +44,11 @@ func ExampleRemoveOsEnv() {
 }
 
 func ExampleCompareOsEnv() {
-	SetOsEnv("foo", "abc")
+	err := SetOsEnv("foo", "abc")
+	if err != nil {
+		return
+	}
+
 	result1 := CompareOsEnv("foo", "abc")
 
 	fmt.Println(result1)