On 7/30/20 8:58 AM, wjoe wrote:
b.reserve(n);
b.length = n;
There may be something that I don't know but I think assigning to the
.length property alone should be the same as reserving and then assigning.
reserve is supposed to make sure no memory will be allocated as elements
are added.
capacity tells how many elements can be added without memory is
allocated. However, the D runtime does its best to elide actual memory
allocation if there is room beyond the array's last element and it's
safe to do so.
This article is considered a must-read for understanding what is going
on behind the scenes:
https://dlang.org/articles/d-array-article.html
I tried to introduce the concept of slices "sharing elements" as well as
how .capacity is used to determine whether sharing will be terminated, here:
http://ddili.org/ders/d.en/slices.html#ix_slices..capacity
Ali
