Expensive QString = ""

[André Wöbbeking]

On Wednesday 12 March 2003 01:18, Alexander Kellett wrote:
> On Wed, Mar 12, 2003 at 01:02:25AM +0100, Andr? W?bbeking wrote:
> > I don't know, if QString = "" appears frequently in time critical code
> > (KHtml, KDE start up, KConfig, ...), but if you really need an empty
> > QString the better solution would be to use a static const QString like
> > QString::null.
>
> just fyi,
> (QString::null).isNull() != QString("").isNull())

I know this. It's the reason, I wrote "but if you really need..."

> therefore, they can't just be randomly switched over.

This depends on the developer's intention. Did he used it, because he's used 
to (C programming, C++ std::string, ...) or was there a really reason for it.

> in fact i kind of dislike the use of a null string
> in place of an formally empty string, its just not
> explicit enough for my liking.

Hm, don't know. There is null in databases, you can also find null objects in 
Design Patterns and probably somewhere else.


André