which is better, string concatentation or substitution?

[Roy Smith]

In article <aMJ7g.2058$No6.45704 at news.tufts.edu>,
John Salerno  <johnjsal at NOSPAMgmail.com> wrote:
>Roy Smith wrote:
>
>> OK, here's a quick tutorial to "big-oh" notation. 
>
>Wow, that was fantastic (and interesting)! Did you just write that? That 
>should be saved somewhere! Mind if I post it on my website? (don't 
>worry, no one goes there anyway) :)

Sure, feel free.  Once you post something on usenet, anybody can
pretty much do anything they want with it.  I do prefer if people
don't use what I write to line birdcages with, but have no control
over that either :-)