What’s wrong with .resize(0) ?

On Fri, Dec 27, 2024 at 1:57 PM Фаррах Фаттахов via Std-Proposals <
std-proposals_at_[hidden]> wrote:

> After working with SFML, I so hated std::vector (I was a bad programmer
> back then and didn't know about the reserve() function, which led to not
> understanding why std::vector is so slow, while a simple array performs
> much better). As a result, in my new project i created my own version of
> std::vector - FE2D::dynamic_array. And there, from the beginning i created
> one useful function - reset()
> ```C++
>
> // Reset the Size of Dynamic Array to Zero, but it's don't Touches the Real Occupied Memory of Dynamic Array
> void reset() { mSize = 0; }
> ```
>
> Instead of clear() it's just setting mSize to zero. It's very useful in
> the situations like
>
> ```C++
> void Render() { // It's called every frame
> // Add a sprites to the FE2D::dynamic_array to draw it later
> m_Renderer.AddSprite(m_Sprite_0);
> m_Renderer.AddSprite(m_Sprite_1);
> m_Renderer.AddSprite(m_Sprite_2);
> ...
> // Draw the Sprites and reset the dynamic arrays to prepare it for the next frame
> m_Renderer.RenderSprites();
> }
> ```
> Here reset() works like clear(), but much faster
>
> In the std::vector or std::deque is no functions like reset() and i want
> to add it there, especially sometimes i get errors because my
> FE2D::dynamic_array is not so good like std::vector and i have to use it
> instead of mine, but there is no function i need. I think reset() will be
> nice thing for std::vector.
> --
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