MemoSoup » file

VBA: how to read text file

admin — Sat, 04 Feb 2012 23:55:58 +0000

This is just example, how to read text file in Visual Basic for Applications (for example, in Excel macro).

It’s just a stub: there is no error processing here, the source file is really text file, no problems with permissions etc.

Sub read_from_text_file()

txtFile = Application.GetOpenFilename("Text Files (*.txt), *.txt")
If txtFile = False Then
MsgBox "No file to process"
Exit Sub
End If

Open txtFile For Input As #1
Input #1, myString
MsgBox myString
Close #1

End Sub

Perl: get file checksum

admin — Tue, 08 Jun 2010 15:12:23 +0000

use Digest::MD5;
use IO::File;

my $chk = Digest::MD5->new();

foreach my $file (@ARGV)
{
$chk->addfile(IO::File->new($file));

print "$file -> ",$chk->hexdigest,"\n";
}

The additional details could be found on IBM site

Oracle: file needs recovery (offline mode)

admin — Thu, 01 Oct 2009 11:00:02 +0000

select d.file# f#, d.name, d.status, h.status
from v$datafile d, v$datafile_header h
where d.file# = h.file#
and (d.status not in ('SYSTEM','ONLINE') or h.status != 'ONLINE' );

If there are such files, the recovery is necessary:

restore the file from the backup
recover datafile ‘&the_file_name’ ;
alter database datafile ‘&the_file_name’ online;

Another possibility (if there are a lot of files):

restore the files from the backup
recover tablespace ‘&tbs_name’ ;
alter tablespace ‘&tbs_name’ online;

Unix: get the file date

admin — Fri, 18 Sep 2009 15:08:18 +0000

ls -1 | cpio -o | cpio -ivt | awk '{print $NF, $(NF-1), $(NF-4), $(NF-3) }'

Warning: I/O expensive for the large files!

Perl:

@a = localtime((stat($my_file))[9]); $a[4]++;
printf "%02d%02d%02d",@a[5,4,3];