I don't like slices in D

[Vitali]

On Thursday, 17 October 2013 at 22:30:52 UTC, Jonathan M Davis 
wrote:
> http://dlang.org/d-array-article.html
>
> It should be enlightening.

Yes, now I understand this article, but only after I had this 
long discussion here. The relevant statement for me is "The 
responsible party for managing a dynamic array's memory is the D 
runtime." For me this means that the programmer isn't suppose to 
manage allocation and reallocation of the array, because it is 
abstracted by the slices. Well, if it's so, then I have doubts 
that it will help to write performant code, BECAUSE of the 
abstraction.

With this in mind I take back everything I said about slices and 
leave only a doubt that slices are performant.

---
To clarify previous things:

   Whether the concatenation "~=" appends without or with 
reallocation, depends on the available capacity of the left 
slice. The concatenation "~" never reallocates and creates always 
a new slice with capacity of 0.

   My prevoius example of the function "removeElement(ref int[], 
int)" will not work. The right implementation would be:
void removeElement(ref int[] arr, int index) {
   arr[index..$-1] = arr[index+1..$].dup;
   arr.length--;
   arr.assumeSafeAppend();
}