When you do my $thing = chr( 12345 ); what does that "character" represent?
Is a Chinese character? Or Sanskrit? Or Cyrillic?
Is it utf-8; utf16; utf32?
Is it big-endian or little-endian?
It's Unicode. It's HANGZHOU NUMERAL TWENTY, in fact.
UTF-8, UTF-16 both represent unicode codepoints, but encode them differently.
When you concatenate a different string to it, the result might depend on the version of Perl. See unicode_strings.
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