Perl - illegal hexadecimal digit warning error

user_1426531 0
Viewed 229

I'm getting a warning on this line of code:

$mismatch = ($_ =~ s/[^\x0]//g);

Illegal hexadecimal digit ']' ignored at xxxxxx.pl line 61. The regex looks valid to me, what is causing this error please? It's the right square bracket that it doesn't like.

Thanks!

perl macos warnings regex
1 Answers

According to the perldoc.perl.org,

Similarly, \xnn, where nn are hexadecimal digits, matches the character whose native ordinal is nn. Again, not using exactly two digits is a recipe for disaster, but you can use \x{...} to specify any number of hex digits.

So, you need to use

s/[^\x00]//g

Or, s/[^\x{0}]//g.

user_38329700
Related