On Sunday, 10 February 2013 at 06:14:37 UTC, Simon wrote:
Hi, I'm new to the D programming language. Overall I'm liking
things very much, but I'm still getting the hang of a few
things.
Here's a basic programming pattern: I have a class called Thing,
and while I'm coding I decide I need N Thing instances.
In C++ that's a matter of
std::vector<Thing> things(N);
In python, I can use a list comprehension.
things = [Thing() for _ in range(N)]
However, the obvious D version doesn't work.
auto things = new Thing[N];
Because Thing.init is null, this produces an array of null
references. Of course, I can write a for loop to fill in the
array after creation, but this feels very un-D-like. Is there a
straightforward way to create a bunch of class instances?
You can create separate function which fills array with instances
and return it. You can make Thing a struct aliased to array of
classes which again initializes properly in constructor an array.
But then you should take care that struct constructor is called.
