When comparing strings using C++, the default behavior is to order by
UTF8 codepoints which impacts comparing strings such as a < b < c
[1][2]. This may not be appropriate in all cases and like in the sort
function [3], it may be helpful to have an optional field for
comparison keys. An example in C++ is at the end of this message. Are
there any suggestions for or objections to adding an optional field with
comparison keys?
[1] https://issues.apache.org/jira/browse/ARROW-9843
[2] https://issues.apache.org/jira/browse/ARROW-14290
[3]
https://github.com/apache/arrow/blob/master/cpp/src/arrow/compute/kernels/vector_sort.cc
/* Follows
*
http://www.localizingjapan.com/blog/2011/02/13/sorting-in-japanese-%E2%80%94-an-unsolved-problem/
* https://stackoverflow.com/questions/2803071/c-sort-array-of-strings
*/
#include<iostream>
#include<algorithm>
int main()
{
string settings[19] = {"システム", "画面", "Windows ファイウォール",
"インターネット オプション", "キーボード",
"メール",
"音声認識", "管理ツール", "自動更新",
"日付と時刻",
"タスク", "プログラムの追加と削除", "フォント",
"電源オプション", "マウス",
"地域と言語オプション",
"電話とモデムのオプション", "Java", "NVIDIA"};
string names[8] = {"Ayumi", "アユミ", "あゆみ", "歩美",
"Tanaka", "タナカ", "たなか", "田中"};
std::sort(begin(settings), end(settings));
std::cout << "Settings" << std::endl;
for(auto& Word: settings){
cout << Word << endl;
}
std::sort(begin(names), std::end(names));
std::cout << "Names" << std::endl;
for(auto& Name: names){
std::cout << Name << std::endl;
}
return 0;
}
