sorting arrays of strings, deleting items from array...

[Bill Lear]

I have a map of sha1 values to file names, thus:

    char[][][char[]] sha_map;

I would like to loop over the values of the map, and print
the file names that are duplicates, sort of like this:

    foreach (key; sha_map.keys) {
        auto file_names = sha_map[key];

        // if only one file name, it is unique, so skip it
        if (file_names.length <= 1) continue;

        // sort file names by criteria that place the file
        // to retain at the front of the array.

        sort(file_names, retain_criteria_comparator());

        foreach (i, file_name; file_names) {
            if (i == 0) continue;
            writefln(file_name);
        }
    }

But I'm at a loss how to do the sort I would like.  Any advice would
be appreciated.



Bill
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