"could ildg" <[EMAIL PROTECTED]> wrote:

> I just want to know how to manipulate a large file and insert or
> delete some stuff in it.

you cannot insert or delete stuff in files in contemporary operating systems;
all you can do is to overwrite parts of the file, or add/remove stuff at the end
of the file.

to change a file in any other way, you have to create a new file (either by
loading the old file into memory, or by copying the contents of the old file
to a new temporary file, and removing/renaming the files when you're done)

</F> 



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