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Postings from July 2017
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.
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