I have a file containing the lines similar to the following entries:
File1.txt:
.....
-rw-r--r-- 1 root staff 4110 Aug 7 17:02 XXX_OrderNum1_date1_time1.txt
-rw-r--r-- 1 root staff 4110 Aug 7 17:02 XXX_OrderNum2_date2_time1.txt
-rw-r--r-- 1 root staff ... (3 Replies)
Dear All,
I have a file name pointer.unl. It's contains the information below:
O|A|4560333089|PBS|AU1|01/04/2003|30/04/2006|D|IGCD|
O|A|4562222089|PBN|AU1|01/02/2006|31/01/2008|D|04065432|
O|A|3454d00089|PKR|AU1|01/03/2008||R|sdcdc|
I only need to extract first... (11 Replies)
Hi everybody
I have some problems with PERL programming.
I have a file with two columns, both with numeric values.
I have to extract the values > 50 from the 2nd columns and sum them among them.
The I have to sum the respective values in the first column on the same line and, at the end, I... (6 Replies)
Can Anyone tell me how to extract the second column of a xls sheet
And compare the content of each row of the column with a .h file.
xls sheet is having only one spreadsheet. (2 Replies)
Hi everyone,
i am new to perl programming, i have a problem in extracting single column from csv file. the column is the 20th column,
please help me..
at present i use this code
#!C:/perl/bin
use warnings;
use strict;
my $file1 = $ARGV;
open FILE1, "<$file1"
or die "Can't... (13 Replies)
Hi All,
Using below command to extract text from a file
grep -E "^.{20}5004" filename.rtf >> 5004This will give all lines with text 5004 starting at position 20.
The file filename.rtf contains several rows (millions). The four characters starting from 20 position is repeating in several... (4 Replies)
Hello Gurus
I have a source file which has the first line as header and the rest are the records
I need to extract the first column from the second line to extract a value
I/P
... (7 Replies)
Hi, it's my first time in this site.
I've a file that look likes
Edges 21 82
Edges 3 22
Edges 34 12
Edges 1 24
Edges 6 2
Edges 12 22
etc. I need extract just the second and third column with the space between them. Thanks:)
Please use code tags next time for your code and data. (4 Replies)
Hi,
I am trying with the below Perl one-liner using regular expression to extract the first and second column of a text file:
perl -p -e "s/\s*(\w+).*/$1/"
perl -p -e "s/\s*.+\s(.+)\s*/$1\n/"
whereas the text file's data looks like:
Error: terminated 2233
Warning: reboot 3434
Warning:... (3 Replies)
Discussion started by: royalibrahim
3 Replies
LEARN ABOUT MOJAVE
io::atomicfile5.18
IO::AtomicFile(3) User Contributed Perl Documentation IO::AtomicFile(3)NAME
IO::AtomicFile - write a file which is updated atomically
SYNOPSIS
use IO::AtomicFile;
### Write a temp file, and have it install itself when closed:
my $FH = IO::AtomicFile->open("bar.dat", "w");
print $FH "Hello!
";
$FH->close || die "couldn't install atomic file: $!";
### Write a temp file, but delete it before it gets installed:
my $FH = IO::AtomicFile->open("bar.dat", "w");
print $FH "Hello!
";
$FH->delete;
### Write a temp file, but neither install it nor delete it:
my $FH = IO::AtomicFile->open("bar.dat", "w");
print $FH "Hello!
";
$FH->detach;
DESCRIPTION
This module is intended for people who need to update files reliably in the face of unexpected program termination.
For example, you generally don't want to be halfway in the middle of writing /etc/passwd and have your program terminate! Even the act of
writing a single scalar to a filehandle is not atomic.
But this module gives you true atomic updates, via rename(). When you open a file /foo/bar.dat via this module, you are actually opening a
temporary file /foo/bar.dat..TMP, and writing your output there. The act of closing this file (either explicitly via close(), or
implicitly via the destruction of the object) will cause rename() to be called... therefore, from the point of view of the outside world,
the file's contents are updated in a single time quantum.
To ensure that problems do not go undetected, the "close" method done by the destructor will raise a fatal exception if the rename() fails.
The explicit close() just returns undef.
You can also decide at any point to trash the file you've been building.
AUTHOR
Primary Maintainer
David F. Skoll (dfs@roaringpenguin.com).
Original Author
Eryq (eryq@zeegee.com). President, ZeeGee Software Inc (http://www.zeegee.com).
REVISION
$Revision: 1.2 $
perl v5.18.2 2005-02-10 IO::AtomicFile(3)