Can I modify the contents of a file, without creating a new one?

[PeiYu Zeng]

Hello,

Can I modify the contents of a file, without creating a new one?

Now, the method that I modify the contents of a file is:
    open( READHANDLE , "sourceFile" );
    open( WRITEHANDLE, ">destiFile" );

    foreach my $line (<READHANDLE>) {
        if it accords with my rules {
            modify $line;
            print(WRITEHANDLE $line);
        }
    }

    close(...);

Is there a method that I could not create a new file to store the modified
informations?


Thanks,
Zen