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Strings with national specific characters are wrongly sorted - Sort [message #57468]

Wed, 25 August 2021 13:01

Klugier
Messages: 1076
Registered: September 2012
Location: Poland, Kraków

Senior Contributor

Hello,

Today I found that sort returns wrong results in term of special characters:

#include <Core/Core.h>

using namespace Upp;

CONSOLE_APP_MAIN
{
	Vector<WString> vec = { "Zbig", "Ąć", "Ęc", "Ala", "Edward" };
	Sort(vec);
	
	for (const auto s : vec)
	{
		Cout() << s << "\n";
	}
}

The results are:

Ala
Edward
Zbig
Ąć
Ęc

and should be:

Ala
Ąć
Edward
Ęc
Zbig

This is probably corner case, because this world doesn't exist in Polish, but anyway the error is there. I believe it is more serve when these character are in the middle of the string and we have a lot of such words.

Here is the article about Polish alphabet and the order of letters.

Klugier

U++ - one framework to rule them all.

[Updated on: Wed, 25 August 2021 17:49]

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