From: Robert Klemme <shortcutter@...>
Date: 2008-05-06T01:50:07+09:00
Subject: Re: String copy-on-write question

On 05.05.2008 18:33, ts wrote:
> Robert Klemme wrote:
>> Interesting.  Do you also happen to know why not an additional field is 
>> used that stores the length?
> 
>  I've not understood : it has a field which give it the length of
>  the string, for example with

Ah, ok.  This happens when one is too lazy to look into the source. :-) 
  Somehow I had assumed that the length was not stored because you made 
the point that the \0 could not be inserted without altering the 
original.  I concluded, there is no length. :-)

>   str = '0' * 200
>   str[100 .. -1]
> 
>  the first object (in str) will have 200 for its length
>  the field length in the new object will have the value 100  
>   
>>                              Is the reason maybe usage of C library 
>> string functions that work on zero terminated strings?
> 
>  only matz know this :-)

Well, maybe he'll stop by and enlighten us.

Kind regards

	robert