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Hashes have no problem with combining marks.

$ perl -MData::Dumper -E' $Data::Dumper::Useqq = 1; $_ = "e\x{301}"; $h{$_} = 1; say $h{$_} || 0; ' 1

The problem is probably that the character appears both in composed and decomposed form.

$ perl -E' $Data::Dumper::Useqq = 1; $a = "e\x{301}"; $b = "\xE9"; $h{$a} = 1; say $h{$b} || 0; ' 0

You can use Unicode::Normalize's NFC or NFD to normalize the form. (Doesn't matter which, as long as you're consistent.)

$ perl -MUnicode::Normalize=NFC -E' $Data::Dumper::Useqq = 1; $a = NFC("e\x{301}"); $b = NFC("\xE9"); $h{$a} = 1; say $h{$b} || 0; ' 1

I'm kinda guessing here since you used 20 lines of code to describe a problem that could be described with 2.


In reply to Re: Unicode combining characters as hash keys? by ikegami
in thread Unicode combining characters as hash keys? by Anonymous Monk

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