Empty string check (#1101)

utils.go

@@ -103,7 +103,7 @@ func parseAccept(acceptHeader string) []string {
 		if index := strings.IndexByte(part, ';'); index >= 0 {
 			part = part[0:index]
 		}
-		if part = strings.TrimSpace(part); len(part) > 0 {
+		if part = strings.TrimSpace(part); part != "" {
 			out = append(out, part)
 		}
 	}
@@ -111,11 +111,10 @@ func parseAccept(acceptHeader string) []string {
 }
 
 func lastChar(str string) uint8 {
-	size := len(str)
-	if size == 0 {
+	if str == "" {
 		panic("The length of the string can't be 0")
 	}
-	return str[size-1]
+	return str[len(str)-1]
 }
 
 func nameOfFunction(f interface{}) string {
@@ -123,7 +122,7 @@ func nameOfFunction(f interface{}) string {
 }
 
 func joinPaths(absolutePath, relativePath string) string {
-	if len(relativePath) == 0 {
+	if relativePath == "" {
 		return absolutePath
 	}
 
@@ -138,7 +137,7 @@ func joinPaths(absolutePath, relativePath string) string {
 func resolveAddress(addr []string) string {
 	switch len(addr) {
 	case 0:
-		if port := os.Getenv("PORT"); len(port) > 0 {
+		if port := os.Getenv("PORT"); port != "" {
 			debugPrint("Environment variable PORT=\"%s\"", port)
 			return ":" + port
 		}