Does reserve() preallocate for futher appends too?

[Adam D. Ruppe]

On Monday, 1 March 2021 at 03:07:19 UTC, Jack wrote:
> isn't clear for me if reserve() does preallocate memory so that 
> that operator like arr ~= x can use previously allocate memory 
> by reserve() or it's just used in slices like b = arr[x .. y]?

Slicing never allocates memory. reserve extends the capacity for 
the ~= operator.