From: Milo Luo <lxybhbh@...>
Date: 2010-01-17T18:00:51+09:00
Subject: Re: How can I modify the xml file directly?

Seebs wrote:
> On 2010-01-17, Milo Luo <lxybhbh@gmail.com> wrote:
>> Do you mean it's related with the file system API?
> 
> Yes.
> 
>> If it can located or got the node & text from XML, it should be modified 
>> the node or text value without too many problems.
> 
> Not in general.
> 
> The problem is that, unless the new value is the same length as the old
> value, modifying text in the middle of the file produces problems.
> 
> Imagine that we have a really simple XML file:
>   <greet>hello, world</greet>
> 
> You want to change that to "hello, world!".  So you do.  And you get:
>   <greet>hello, world!/greet>
> 
> See the problem?  You can't make the later parts of the file move ahead;
> you would actually have to rewrite the whole file.
> 
> -s

Oh, I got the meaning. It will overwrite later characters, data will 
lost...
That's bad.


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