How to write similar code D?

[Dennis Ritchie via Digitalmars-d-learn]

On Tuesday, 10 February 2015 at 01:31:54 UTC, FG wrote:
> On 2015-02-10 at 01:41, bearophile wrote:
>>
>>     auto query = iota(2, 12)
>>                  .map!(c => Tuple!(int,"length", int,"height", 
>> int,"hypotenuse")
>>                                   (2 * c, c ^^ 2 - 1, c ^^ 2 + 
>> 1))
>>                  .map!(x => "%3d%4d%4d".format(x.height, 
>> x.hypotenuse, x.length));
>>
>
> I took advantage of the fact that all elements were of the same 
> type:
>
>     auto query = iota(2, 2 + 10)
>     .map!(c => ["Length": 2 * c, "Height": c * c - 1, 
> "Hypotenuse": c * c + 1])
>     .map!(x => format("%4d%4d%4d", x["Height"], 
> x["Hypotenuse"], x["Length"]));
>     ...
>
> and was surprised that it worked straight away. :)
> But definitely this looks better and less complicated:
>
>     auto query = iota(2, 12)
>         .map!(c => tuple(c ^^ 2 - 1, c ^^ 2 + 1, 2 * c));
>     foreach (x; query)
>         writefln("%4d%4d%4d", x[]);
>
> It's the foreach version, since `each` isn't officially out yet.

Thank you.