feat: add IsPrintable

validator/validator.go

@@ -58,8 +58,8 @@ func IsAllLower(str string) bool {
 	return str != ""
 }
 
-// IsASCII checks if string is ASCII char.
-// Play:
+// IsASCII checks if string is all ASCII char.
+// Play: todo
 func IsASCII(str string) bool {
 	for i := 0; i < len(str); i++ {
 		if str[i] > unicode.MaxASCII {
@@ -69,6 +69,20 @@ func IsASCII(str string) bool {
 	return true
 }
 
+// IsPrintable checks if string is all printable chars.
+// Play: todo
+func IsPrintable(str string) bool {
+	for _, r := range str {
+		if !unicode.IsPrint(r) {
+			if r == '\n' || r == '\r' || r == '\t' || r == '`' {
+				continue
+			}
+			return false
+		}
+	}
+	return true
+}
+
 // ContainUpper check if the string contain at least one upper case letter A-Z.
 // Play: https://go.dev/play/p/CmWeBEk27-z
 func ContainUpper(str string) bool {