Hi,
I have file abc.txt which has keys and emails addresses
abc.txt
emailkey1:sam@abc.com
emailkey1:tom@abc.com
emailkey2:rqw@abc.com
emailkey2:tut@abc.com
I have a shell script where i pass key as the parameter and i want all the email addresses within that key concatenated by a comma... (21 Replies)
I have a set of variables:
f1="./someFolder"
.
.
f10="./someOtherFolder"
And I'm trying to use the following loop
for (( i = 0; i <= 10; i++ ))
do
temp=f$i
done
I'm trying the get the values from my set of variable to make directories, but I can't seem the get those value... (3 Replies)
- I m retreving values from database and wish to use those values later in my shell script. I m placing these values in an array da_data but outside loop array is empty.Problem is its treating array as local inside loop hence array is empty outside loop.
Plz go through the script and suggest how... (1 Reply)
I need to do something like this:
for i in 1 2 3 4 5; do
arr=$(awk 'NR="$i" { print $2 }' file_with_5_records)
done
That is, parse a file and assign values to an array in an ascending order relative to the number of record in the file that is being processed on each loop.
Is my... (2 Replies)
I'm a programming noob. I'm trying to run a memory intensive process for many files. But when I use the following script, it runs fine for the first 5-7 files, then runs out of memory. Monitoring the output files, it's clear the processes are going on in parallel. Once 5-7 of the files are being... (18 Replies)
Hi All
I am trying to fetch the size of three files into three separate variables within a for loop and am doing something like this:
for i in ATT1 ATT2 ATT3
do
size_$i=`ls -ltr $i | awk '{print $5}'`
echo ${size_$i}
done
but am getting the below error:
ksh: size_ATT1=522: not... (3 Replies)
array=( 8 5 6 2 3 4 7 1 9 0 )
for i in "${array}"
do
echo $i
done
# i need the output like this by swapping of array values
0
9
1
7
4
3
2
6
5
8 (7 Replies)
I have a headerless array of 1000 columns x 100000 rows. The array only contains 4 values; 0/0, 0/1, 1/1, ./.
Here I am showing the 1st 3 rows and columns of the input array
0/0 0/0 1/1
0/1 0/1 0/1
0/0 ./. 0/0
0/0 0/0 0/0
I would like to convert the values in... (9 Replies)
Hello!
I'm making an English to Morse Code translator and I was able to mostly get it all working by looking through older posts here; however, I have one small problem.
When I run it it's just printing spaces for where the characters should be. It runs the right amount of times, and if I try... (3 Replies)
Discussion started by: arcoleman10
3 Replies
LEARN ABOUT DEBIAN
io::async::loop::epoll
IO::Async::Loop::Epoll(3pm) User Contributed Perl Documentation IO::Async::Loop::Epoll(3pm)NAME
IO::Async::Loop::Epoll - use "IO::Async" with "epoll" on Linux
SYNOPSIS
use IO::Async::Loop::Epoll;
use IO::Async::Stream;
use IO::Async::Signal;
my $loop = IO::Async::Loop::Epoll->new();
$loop->add( IO::Async::Stream->new(
read_handle => *STDIN,
on_read => sub {
my ( $self, $buffref ) = @_;
while( $$buffref =~ s/^(.*)
?
// ) {
print "You said: $1
";
}
},
) );
$loop->add( IO::Async::Signal->new(
name => 'INT',
on_receipt => sub {
print "SIGINT, will now quit
";
$loop->loop_stop;
},
) );
$loop->loop_forever();
DESCRIPTION
This subclass of IO::Async::Loop uses IO::Epoll to perform read-ready and write-ready tests so that the O(1) high-performance multiplexing
of Linux's epoll_pwait(2) syscall can be used.
The "epoll" Linux subsystem uses a registration system similar to the higher level IO::Poll object wrapper, meaning that better performance
can be achieved in programs using a large number of filehandles. Each epoll_pwait(2) syscall only has an overhead proportional to the
number of ready filehandles, rather than the total number being watched. For more detail, see the epoll(7) manpage.
This class uses the epoll_pwait(2) system call, which atomically switches the process's signal mask, performs a wait exactly as
epoll_wait(2) would, then switches it back. This allows a process to block the signals it cares about, but switch in an empty signal mask
during the poll, allowing it to handle file IO and signals concurrently.
CONSTRUCTOR
$loop = IO::Async::Loop::Epoll->new()
This function returns a new instance of a "IO::Async::Loop::Epoll" object.
METHODS
As this is a subclass of IO::Async::Loop, all of its methods are inherited. Expect where noted below, all of the class's methods behave
identically to "IO::Async::Loop".
$count = $loop->loop_once( $timeout )
This method calls the "poll()" method on the stored "IO::Epoll" object, passing in the value of $timeout, and processes the results of that
call. It returns the total number of "IO::Async::Notifier" callbacks invoked, or "undef" if the underlying "epoll_pwait()" method returned
an error. If the "epoll_pwait()" was interrupted by a signal, then 0 is returned instead.
SEE ALSO
o IO::Epoll - Scalable IO Multiplexing for Linux 2.5.44 and higher
o IO::Async::Loop::Poll - use IO::Async with poll(2)AUTHOR
Paul Evans <leonerd@leonerd.org.uk>
perl v5.14.2 2012-04-10 IO::Async::Loop::Epoll(3pm)