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

[neal via Digitalmars-d-learn]

On Wednesday, 22 October 2014 at 01:58:19 UTC, neal wrote:
> On Wednesday, 22 October 2014 at 01:02:17 UTC, bearophile wrote:
>> neal:
>>
>>> Anybody have any suggestions?
>>
>> Something like this, perhaps?
>>
>> data.sort!q{ a[4] > b[4] };
>>
>> Bye,
>> bearophile
>
> Hmmm.. Im getting some interesting results here. So when i put
> all of the populations in an area and used this code:
>
> sort!("a>b")(population);
> writeln("Top 5 population in 1993: ");
> for(int i = 0; i < 5;i++)
>      writeln(population[i]);
>
>
> I get:
>
> Top 5 population in 1993:
> 1189550675
> 916529257
> 264493898
> 191658591
> 156810428
>
>
> The problem there is that i lose the country that the population
> is associated with (the top one being China).
>
> When I run your code:
>
> data.sort!q{ a[4] > b[4] };
> for(int i = 0; i < 5; i++)
>     writeln(data[][]);
>
> I get this result for the top 5:
>
> ["Portugal", "1593140", "-668536", "1993", "9993683", "8"]
> ["Anguilla", "114", "-536", "1993", "9865", "10"]
> ["Malawi", "31745", "-25289", "1993", "9862531", "6"]
> ["Grenada", "2274", "-4890", "1993", "96908", "2"]
> ["Burkina Faso", "22613", "-38738", "1993", "9688261", "6"]
>
>
> Notice that the top populations arent correct.


Wow sorry I just realized my mistake. the array is an array of 
strings!

data.sort!q{ to!int(a[4]) > to!int(b[4]) };

This code fixes my problem! Thanks for the quick responses guys. 
you rock!