Sorting with non-ASCII characters

[Chris]

On Thursday, 19 September 2013 at 18:44:54 UTC, Jos van Uden 
wrote:
> On 19-9-2013 17:18, Chris wrote:
>> Short question in case anyone knows the answer straight away:
>>
>> How do I sort text so that non-ascii characters like "á" are 
>> treated in the same way as "a"?
>>
>> Now I'm getting this:
>>
>> [wow, ara, ába, marca]
>>
>> ===> sort(listAbove);
>>
>> [ara, marca, wow, ába]
>>
>> I'd like to get:
>>
>> [ ába, ara, marca, wow]
>
> If you only need to process extended ascii, then you could 
> perhaps
> make do with a transliterated sort, something like:
>
> import std.stdio, std.string, std.algorithm, std.uni;
>
> void main() {
>     auto sa = ["wow", "ara", "ába", "Marca"];
>     writeln(sa);
>     trSort(sa);
>     writeln(sa);
> }
>
> void trSort(C, alias less = "a < b")(C[] arr) {
>     static dstring c1 = "àáâãäåçèéêëìíîïñòóôõöøùúûüýÿ";
>     static dstring c2 = "aaaaaaceeeeiiiinoooooouuuuyy";
>     schwartzSort!(a => tr(toLower(a), c1, c2), less)(arr);
> }

Thanks a million, Jos! This does the trick for me.