Sorting array of string arrays by an element in the string array

[Joel via Digitalmars-d-learn]

On Wednesday, 22 October 2014 at 00:32:56 UTC, neal wrote:
> Just curious if this is possible. I have some data on different 
> countries that i have stored in a multidimensional array called 
> data[][]. What I want to do is sort data[][] by population 
> which happens to be stored in data[i][4] where i is the index 
> to iterate from country to country.
>
> I would like something like this:
>
> sort!("a>b")(data[][4]);
>
> Anybody have any suggestions?

More like this:
sort!(a.country > b.country)(data[][4]);