in reply to Re^4: Question about warnings and arrays
in thread Question about warnings and arrays

Well, theoretically the answer to three of your questions is yes, it's possible, if you code it correctly ;-)

Other than that, we'd need to see some example expected output and some of the code your questions are about. Please have a look at I know what I mean. Why don't you? (as well as the usual How do I post a question effectively?).

In general, you can open a binary file for editing via open my $fh, '+<:raw', $filename or die $!;

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Re^6: Question about warnings and arrays
by james28909 (Deacon) on Aug 13, 2014 at 12:53 UTC
    let me give an example: 
    use File::Slurp;
open ( my $file, '<', "file" );
binmode($file);

my @array = read_file ("pointers");

seek ( $file, 0x67, 0 );
print $file @array[0];

foreach ( my $line(@array){
    chomp ( $line );
    seek ( $file, 20, 0 );
    print ( $file $this );
}

    [download]
    this is the code i have tried. it will write to the file, but not in an expected way. As you know i do most of my work/programs on binary files. so the data being pushed to the array will have to be written back to the file, but as byte characters/hexadecimal characters and in raw format.

    so when it puts "29" into the array, i need it to write 29 in the raw file as a byte, and the code above writes it as a character 29 (which is 32 39 in plain text).

    The open file is in raw or binary mode, but it writes in text mode from the array. i need to write in binary mode. if you run the script on the files i posted earlier, then you can make a file with this in it: 
    21
4B
A8
C6

    [download]
    and read that into an array, then try to write from the array to a raw file, it doesnt work, and looks to still write to the raw file in text mode. and if i try to binmode the array, it throws errors as expected.

    im am very confused at this point, as i need to write the pointers back to the file but in raw/binary mode. and i am unsure how to do that from an array because it looks as if it writes back to a raw file in text mode.
[reply]
[d/l]
[select]
      What's in @array? Maybe you need to pack your data before printing them?
      لսႽ† ᥲᥒ⚪⟊Ⴙᘓᖇ Ꮅᘓᖇ⎱ Ⴙᥲ𝇋ƙᘓᖇ
[reply]
        yoru a genius D:< it would have took me a few days to even think about that prob lol EDIT: nope, i get error when i try to pack the data to any format and it still writes in text mode.
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