fix: revise based on comment

Author: sh-tatsuno

kadai1/sh-tatsuno/gophoto/conv/img.go

@@ -39,8 +39,8 @@ func (i *Img) Save(path string) error {
 	ext := filepath.Ext(path)
 	var err error
 	err = func(ext string) error {
-		for _, postfix := range []string{".jpeg", ".jpg", ".gif", ".png"} {
-			if ext == postfix {
+		for _, suffix := range []string{".jpeg", ".jpg", ".gif", ".png"} {
+			if ext == suffix {
 				return nil
 			}
 		}
@@ -79,8 +79,8 @@ func (i *Img) AddExt(ext string) string {
 	return i.Path + ext
 }
 
-// Replace replace image
-func (i *Img) Replace(ext string) error {
+// Convert convert image
+func (i *Img) Convert(ext string) error {
 
 	// check path
 	prevPath := i.Path

kadai1/sh-tatsuno/gophoto/dir/lookup.go

@@ -26,7 +26,7 @@ func Lookup(dir string, ext string, pathList []string) ([]string, error) {
 			}
 		}
 
-		// check if the postfix is equal to the input format
+		// check if the suffix is equal to the input format
 		if filepath.Ext(path) == ext {
 			pathList = append(pathList, path)
 		}

kadai1/sh-tatsuno/gophoto/main.go

@@ -49,7 +49,7 @@ func run(args []string) int {
 	var dirName, input, output string
 
 	// args
-	flags := flag.NewFlagSet("imgconv", flag.ContinueOnError)
+	flags := flag.NewFlagSet(os.Args[0], flag.ContinueOnError)
 	flags.Usage = usage
 	flags.IntVar(&n, "n", 10, "number of maximum images to convert; default is 10.")
 	flags.StringVar(&dirName, "d", "", "directory path.")
@@ -84,7 +84,7 @@ func run(args []string) int {
 			return ExitCodeError
 		}
 
-		if err := img.Replace(output); err != nil {
+		if err := img.Convert(output); err != nil {
 			fmt.Printf("can not convert file, %v\n", err)
 			return ExitCodeError
 		}