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rudi

RegEx: Howto *INVERT* a class of characters?

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Hi.

I want to catch the part of a string from the start of the string with a stringregexp().

This code pasted by Xenobiologist was my start.

I didn't want to define a class for valid chars by specifying all valid chars. Instead of that approach I wanted to invert the "not allowed" chars:

Isn't (abc) a character class matching any "a", "b", "c", and isn't a "^" the 'ClassInverter', so that (^abc) would match any Char BUT "a", "b", "c"?

muttley regards, Rudi.


Earth is flat, pigs can fly, and Nuclear Power is SAFE!

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Not sure if you are looking for an array or boolean result...

Array:

$string = "abcdefghijklmnopqrstuvwxyz"
$result = StringRegExp($string, "[^abc]", 3)
For $X = 0 to Ubound($result)-1
    ConsoleWrite("["&$X&"]: " & $result[$X] & @CRLF)
Next

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Regardless of what output you want, classes go inside [ ] square brackets, and ^ will cause it to match anything not in the set ONLY if it is the first character after the opening bracket [

http://www.regular-expressions.info/reference.html

Bookmark that page... I use it regularly for reference.


Regards,Josh

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Regardless of what output you want, classes go inside [ ] square brackets,

Yes, that's a typo. In my code I used []

... and ^ will cause it to match anything not in the set ONLY if it is the first character after the opening bracket [

http://www.regular-expressions.info/reference.html

So [^abc] should match any characters BUT "a", "b", "c", did I get that correctly?

Thanks, Rudi.


Earth is flat, pigs can fly, and Nuclear Power is SAFE!

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Yes, that's a typo. In my code I used []

So [^abc] should match any characters BUT "a", "b", "c", did I get that correctly?

Thanks, Rudi.

Correct. But the method I posted will just return an array of all characters that aren't a, b, or c. If you want to strip these characters and return just a string you will need StringRegExpReplace.

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... you will need StringRegExpReplace.

Why StringRegExpREPLACE? I want to catch the part of a string that matches this class from the beginning of the lines muttley

I'm on site at that customer next week again, then I'll look up what I messed up in my stringregexp().

IIRC I tried to use something like "^[^\\/:\*\?\"\<\>\|]+" :) I expected this to catch from the beginning of the string the substring upto the position with the first invalid character (exclusive). (matchmode = 3)

Regards, Rudi.


Earth is flat, pigs can fly, and Nuclear Power is SAFE!

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