[Qt-interest] Using a QList<float> as a float[] parameter

[Sean Harmer]

On Wednesday 23 June 2010 14:05:01 Duane Hebert wrote:
> >"Ori Lahav" <vbcrlf at gmail.com> wrote in message
> >>news:AANLkTilQ95HAdXUtmod7T6icybkK6XJAW9TY9xrJanmv at mail.gmail.com... Hi
> >Srdjan,
> >This function is in an external library, can't change it.
> 
> You can change your list of floats to std::vector<float> and then pass it
> by ref as
> 
> std::vector<float> Floats;
> //fill it
> 
> pass it as &Floats[0]
> 
> std::vector is guaranteed to be contiguous so this should be safe.

You can also do the same trick with QList<float> I think as that is also 
stored in a contiguous section of memory for types where sizeof(type) <= 
sizeof(void*).

I still prefer to use 

For larger types, QList stores pointers to the objects instead.

Sean