Array in array

[bearophile]

xfiles:

> I want create a multi array like python.
> For example(in python):
> a=[1,2]
> a.append([1234],3)
> a.append([[4],5],6)
>
> and result is = [1,2,[1234],3,[[4],5],6]
>
> How can I do this in D

In D there are several different ways to represent that data 
structure, but being D not dynamically typed (and not having 
algebraic data types) none of them are as nice as solutions in 
Python (or ML-derived languages).

This shows one way to do it in an efficient way:
http://rosettacode.org/wiki/Flatten_a_list#D

If efficiency is less important, you can use an heap-allocated 
multi-way tree. Or even a little hierarchy with two classes.

Another solution is to use some kind of variant/any/multi data 
type.

So explain your needs better and maybe someone will suggest what 
specif solution to use.

Bye,
bearophile