(Javascript) Regex specific characters but excluding

Question

I'm struggle with regex. I found some seperated solution for my problem, but doesn't work together. Now I'm not even sure if this is possible at all.

I have a string like:

"ÿÿÿÿÿÿBla bla äöüß!ÿÿÿÿÿ\nÿÿÿстрокаÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿQ\u001f\u0001\u0001"

I want replace all characters

between 0x00 and 0x1F (until space, non pritable)
and 0xFF ("ÿ")
but not 0x0A and 0x0D. (line breaks)

I have both cases seperated:

// Works great but removes linebreaks. str = str.replace(/[\x00-\x1F\xFF]+/g, '');

I want to exclude line breaks.

//This only extract the line breaks. str = str.replace(/[^\x0A]/g, '');

But i want this together / merged. Like that (pseudo)

'''// Incorrect regex. But correct logic. str = str.replace(/[\x00-\x1F\xFF^\x0A^\x0D]+/g, ''); '''

I have no idea. I would be really grateful for constructive help.

Wanted result of string:

"Bla bla äöüß!\nстрокаQ"

The string must be compatible with UTF-8. I know there is a regex function for removing non pritable character. But this also removes umlauts (äöü), cyrillic alphabet and others.

Try /[\x00-\x09\x0B\x0C\x0E-\x1F\xFF]+/g

Wiktor Stribiżew
– Wiktor Stribiżew

2016-11-02 15:12:05 +00:00
Commented Nov 2, 2016 at 15:12 — Wiktor Stribiżew
– Wiktor Stribiżew, Commented Nov 2, 2016 at 15:12

Wiktor Stribiżew · Accepted Answer · 2016-11-02 15:14:24Z

1

You may use

/[\x00-\x09\x0B\x0C\x0E-\x1F\xFF]+/g
       ^^^^^^^^^^^^^^^^

The point is that you need to re-organize the ranges in the character class, to exclude \x0A (newline) and \x0D (carriage return).

See demo below:

var s = "ÿÿÿÿÿÿBla bla äöüß!ÿÿÿÿÿ\nÿÿÿстрокаÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿQ\u001f\u0001\u0001";
console.log(s);
var res = s.replace(/[\x00-\x09\x0B\x0C\x0E-\x1F\xFF]+/g,'');
console.log(res);

answered Nov 2, 2016 at 15:14

Wiktor Stribiżew

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3 Comments

Dominik Over a year ago

Ok, this is a great solution. So simple. Just multiple ranges. It's a kind embarrassing for me. This night was too long. Thanks mate. :)

Dominik Over a year ago

This is a workaround. But how to exclude a specific character. This question is not closed. It would be interesting to know it.

Wiktor Stribiżew Over a year ago

You do not need that, but you may - /(?:(?![\x0A\x0D])[\x00-\x1F\xFF])+/g

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