On Tuesday 04 July 2017 11:22:42 demerphq wrote: > No. This is a myth. Plain and simply a myth. > > People have a hard time accepting it, but the utf8 flag tells parts of > the internals to use different rules for certain operations, when set > those rules are Unicode. When the flag is not set the default rules > are derived from ASCII. > > You can see the difference in the following: > > "ba\x{DF}"=~/ss/i; $ perl -E 'say "matched" if "ba\x{DF}"=~/ss/i;' matched > "ba\N{U+DF}"=~/ss/i; $ perl -E 'say "matched" if "ba\N{U+DF}"=~/ss/i;' matched > The latter matches because \N{U+DF} produces the unicode code point > DF, and the former does not match, because \x{DF} produces the ASCII > octet DF instead. The former is an ASCII string, and the later is a > Unicode string. No, both were matched under Perl 5.24.1.Thread Previous | Thread Next