added remove control characters func

langext/string.go

@@ -3,6 +3,7 @@ package langext
 import (
 	"fmt"
 	"strings"
+	"unicode"
 )
 
 func StrLimit(val string, maxlen int, suffix string) string {
@@ -136,3 +137,12 @@ func StrWrap(val string, linelen int, seperator string) string {
 
 	return res
 }
+
+func StrRemoveControlCharacters(str string) string {
+	return strings.Map(func(r rune) rune {
+		if unicode.IsControl(r) {
+			return -1
+		}
+		return r
+	}, str)
+}