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March 01, 2021 Does reserve() preallocate for futher appends too? | ||||
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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]? |
March 01, 2021 Re: Does reserve() preallocate for futher appends too? | ||||
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Posted in reply to Jack | 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.
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March 01, 2021 Re: Does reserve() preallocate for futher appends too? | ||||
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Posted in reply to Adam D. Ruppe | On Monday, 1 March 2021 at 03:12:42 UTC, Adam D. Ruppe wrote:
> 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.
thanks
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March 01, 2021 Re: Does reserve() preallocate for futher appends too? | ||||
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Posted in reply to Jack | 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]? You may potentially find this article of use: https://dlang.org/articles/d-array-article.html |
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