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=Invariant-Strings.html&Itemid=29

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?

BCS wrote:
> 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?

I'm not sure what you mean.

BCS wrote:
> 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!

You can actually see him move, and talk, too, if you go here!
  http://video.google.com/videoplay?docid=-7073020265668105471

:-)

Bill Baxter wrote:
> You can actually see him move, and talk, too, if you go here!
>   http://video.google.com/videoplay?docid=-7073020265668105471


That's just a very clever animation. Those google fellows are good!

On Thu, 13 Mar 2008 14:25:00 -0700, Walter Bright wrote:

> 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=Invariant-
Strings.html&Itemid=29

There is a poll in the right corner:
"What programming language do you PREFER to work in?"
Would be nice if they would have a "D" option.

Reply to Walter,

> BCS wrote:
> 
>> 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?
>> 
> I'm not sure what you mean.
> 

You say that the common ops generally don't mutate the data and then list "moving references around, slicing, and concatenating". I guess my thought is that the first two are a bit more self explanatory than the last. Clearly 1 & 2 are non mutating but, a guy who is a few Lattes behind might not notice that because you, in general, don't known what comes after a string, if you want to extend a string (for concatenating), you need to allocate new ram for it, thus leaving the first blocks untouched. (I'm not thinking specific to D here).

Reply to Bill,

> BCS wrote:
> 
>> 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=Invari
>>> an t-Strings.html&Itemid=29
>>> 
>> wow, a publicly available picture of Walter!
>> 
> You can actually see him move, and talk, too, if you go here!
> http://video.google.com/videoplay?docid=-7073020265668105471
> :-)
> 

I think the thumbnail pix on the /blog/ has better resolution!

BCS wrote:
> You say that the common ops generally don't mutate the data and then list "moving references around, slicing, and concatenating". I guess my thought is that the first two are a bit more self explanatory than the last. Clearly 1 & 2 are non mutating but, a guy who is a few Lattes behind might not notice that because you, in general, don't known what comes after a string, if you want to extend a string (for concatenating), you need to allocate new ram for it, thus leaving the first blocks untouched. (I'm not thinking specific to D here).

All I meant was that a common operation is concatenating - an operation that in C is usually done by allocating a mutable buffer, then copying the strings into it.

Walter Bright wrote:
> 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=Invariant-Strings.html&Itemid=29 
> 

Weird.  Somebody edited the comments I posted.  They basically did the edits I wanted to make but couldn't, but it still leaves me with a creepy feeling.

--bb