Hello Leon,
Tuesday, January 01, 2002, Leon <[EMAIL PROTECTED]> wrote:
>> Can you open a file for reading and writing as the same time?
yes.
L> I have asked the question of can I read and write to the same file
L> simultaneously, such as this :-
L> open FILE, 'myfile.txt' or die "$!\n";
L> open FILE2, '>>myfile.txt' or die "$!\n";
L> while (<FILE>){
L> # do some changes to $_;
L> print FILE2 $_;
L> };
L> but I did not get any response. Therefore I dont think we can do that.
check
perldoc -f open
for "+", ">", ">>" modifiers.
and, may be you should check 'seek' function.
perldoc -f seek
"You can't usually use either read-write mode for
updating textfiles, since they have variable length records. See the
-i switch in the perlrun manpage for a better approach." - you are warned.
as usual, you can use temporary files as a i/o buffer.
Best wishes,
Maxim mailto:[EMAIL PROTECTED]
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