> For the complete documentation index, see [llms.txt](https://trizen.gitbook.io/sidef-lang/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://trizen.gitbook.io/sidef-lang/programming_tasks/s/strip_control_codes_and_extended_characters_from_a_string.md).

# Strip control codes and extended characters from a string

```ruby
var str = "\ba\x00b\n\rc\fd\xc3\x7ffoo"

var letters = str.chars.map{.ord}
say letters.map{.chr}.join.dump

var nocontrols = letters.grep{ (_ > 32) && (_ != 127) }
say nocontrols.map{.chr}.join.dump

var noextended = nocontrols.grep{ _ < 127 }
say noextended.map{.chr}.join.dump
```

#### Output:

```
"\ba\0b\n\rc\fd\xC3\x7Ffoo"
"abcd\xC3foo"
"abcdfoo"
```