Invariant strings on Dr. Dobb's

[BCS]

Reply to Walter,

> Dr. Dobb's has invited me to write a blog for them, so here's my first
> installment on invariant strings:
> 
> http://www.dobbscodetalk.com/index.php?option=com_myblog&show=Invarian
> t-Strings.html&Itemid=29
> 

wow, a publicly available picture of Walter!

And on the content; you mention concatenation as working on invariant strings. 
I assume this is because you generally can't concatenate in place anyway?