I have attached the file, but this also will give you a quick look at the changes. Everything with a "+" is a change I added, everything with a "-" are lines I removed.
Hello all
im facing some kind of problem i have this string :
functionA() $" "$ functionB("arg1") $" = "$
i will like to replace all the pairs of opening and closing "$" to be something like that
functionA() <#" "#> functionB("arg1") <#" = "#>
i cant of course do is with simple ... (1 Reply)
Hi.
I have three arrays.
@a=('AB','CD','EF');
@b=('AB,'DG',HK');
@c=('DD','TT','MM');
I want to compare the elements of the first two array and if they match then so some substition.
I tried using the if statement using the scalar value of the array but its not giving me any output.
... (7 Replies)
Hi all,
I am trying to compare two arrays in perl using the following code.
foreach $item (@arrayA){
push(@arrayC, $item) unless grep(/$item/, @arrayB); ... (1 Reply)
I have a main file with variable tokens like this:
name: File1
===========
Destination/Company=@deploy.company@
Destination/Environment=@deploy.env@
Destination/Location=@deploy.location@
Destination/Domain=@deploy.location@
MIG_GatewayAddresses=@deploy.gwaddress@
MIG_URL=@deploy.mig_url@... (1 Reply)
Hi there, i have been trying different methods and i wonder if somebody could explain to me how i would perform a comparison on two arrays for example
my @array1 = ("gary" ,"peter", "paul");
my @array2 = ("gary" ,"peter", "joe");
I have two arrays above, and i want to something like this... (5 Replies)
Hi,
I'm new to perl and i have to write a perl script that will compare to log/txt files and display the differences. Unfortunately I'm not allowed to use any complied binaries or applications like diff or comm.
So far i've across a code like this:
use strict;
use warnings;
my $list1;... (2 Replies)
What do i need to do have the below perl program load 205 million record files into the hash. It currently works on smaller files, but not working on huge files. Any idea what i need to do to modify to make it work with huge files:
#!/usr/bin/perl
$ot1=$ARGV;
$ot2=$ARGV;
open(mfileot1,... (12 Replies)
I have these two file that I am trying to compare using shell arrays. I need to find out the changed or the missing
enteries from File2. For example. The line "f nsd1" in file2 is different from file1 and the line "g nsd6" is missing
from file2.
I dont want to use "for loop" because my files... (2 Replies)
Hi everyone
I have a question for you, as I am trying to learn more about Perl and work with some weather data. I have an ascii file (shown below) that has 10 lines with different columns. What I would like is have Perl find an "anomalous" value by comparing a field with the values from the last... (2 Replies)
Discussion started by: lucshi09
2 Replies
LEARN ABOUT CENTOS
io::atomicfile
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 v5.16.3 2005-02-10 IO::AtomicFile(3)