if you are trying to create junk.txt , and assuming it hasn't been created yet, then why are you reading it using the while loop first?? do it this way
Code:
bdf <options> | while read ....
do
# do your stuff
done
Hi there,
Can show some hit why i got this error?
For eg i have a.txt in which consist of contents as below
1|781494-0015|IV\|I||C|RECHARGE|Success\|V\|\||2007-12-04 02:33:13.000|
2|762405-0405|IV\|I||C|RECHARGE|Success\|V\|\||2007-12-04 02:33:17.000|
In fact , i want to perfrom to have... (2 Replies)
Hello,
So I sorted my file as I was supposed to:
sort -n -r -k 2 -k 1 file1 | uniq > file2
and when I wrote
> cat file2
in the command line, I got what I was expecting, but in the script itself
...
sort -n -r -k 2 -k 1 averages | uniq > temp
cat file2
It wrote a whole... (21 Replies)
I need to change all Newline caracters (\12) to Fieldseparator(\34).
tr -A '\12' '\34' <file1> file2
Replace all delete (\177) with Newline (\12)
tr -A '\177' '\12' <file2> file3
Put the name of the file first in all rows.
awk '{printf "%s\34%s\n", FILENAME,$0} file3 > file4
So far no... (6 Replies)
Hi Guys,
I was recently come across some code to hopefully learn a little bit about putting Shell commands into PHP application to run on a Linux server. However, I don't understand the command AT ALL... and was wondering if anyone can interpret it:
cat userIDs.dat | awk '{s=s+1; if... (1 Reply)
Hi,
I am doing this:
ll -tr | awk '{print $6, $7, $8, $9}'
the result is:
Dec 30 2008 text1.txt
Mar 4 2009 text2.txt
Apr 10 2009 text3.txt
and now I want to show the content of $9 using below:
ll -tr | awk '{print $6, $7, $8, $9}' ; '{cat $9}' (25 Replies)
Hi,
I am working on kernel parameters, want to check values under /proc/sys/kernel
below I tried for kernel.sem
SEMMNS: 4096 cat /proc/sys/kernel/sem | awk '{print $2}'
awk '{ if ($2 < 33000) print }' /proc/sys/kernel/sem |awk '{print $2}'
32000
The above... (7 Replies)
I have 133 .txt files in a directory that I am combining into 1 file. The problem is when I use awk or cat to combine the files I get out put like this:
output
85 138662360 KCNT1
86 138662962 KCNT1
82 138657053 KCNT1
83 138657635 KCNT1
95 138646881 KCNT1... (12 Replies)
I need the use sed or AWK using cat the file
Node1
TDEV RW 1035788
TDEV RW 1035788
Server1
TDEV RW 69053
Server2
TDEV RW 69053
TDEV RW 103579
Server3
TDEV RW 69053
server4
RDF1+TDEV RW 69053
RDF1+TDEV RW 517894
RDF1+TDEV RW 621473
server6
TDEV RW 34526
TDEV RW 34526 (22 Replies)
Discussion started by: ranjancom2000
22 Replies
LEARN ABOUT DEBIAN
io::async::detachedcode
IO::Async::DetachedCode(3pm) User Contributed Perl Documentation IO::Async::DetachedCode(3pm)NAME
"IO::Async::DetachedCode" - execute code asynchronously in child processes
SYNOPSIS
This object is used indirectly via the "IO::Async::Loop"'s "detach_code" method.
use IO::Async::Loop;
my $loop = IO::Async::Loop->new;
my $code = $loop->detach_code(
code => sub {
my ( $number ) = @_;
return is_prime( $number );
}
);
$code->call(
args => [ 123454321 ],
on_return => sub {
my $isprime = shift;
print "123454321 " . ( $isprime ? "is" : "is not" ) . " a prime number
";
},
on_error => sub {
print STDERR "Cannot determine if it's prime - $_[0]
";
},
);
$loop->run;
DESCRIPTION
This object class provides a legacy compatibility layer for existing code that tries to construct such an object. It should not be used for
new code; see instead the IO::Async::Function object, for which this is now a wrapper.
CONSTRUCTOR
$code = $loop->detach_code( %params )
This function returns a new instance of a "IO::Async::DetachedCode" object. The %params hash takes the following keys:
code => CODE
A block of code to call in the child process.
stream
marshaller
These arguments are no longer used; any values passed will be ignored.
workers => INT
Optional integer, specifies the number of parallel workers to create.
If not supplied, 1 is used.
exit_on_die => BOOL
setup => ARRAY
Passed through to the underlying "IO::Async::Function" object.
METHODS
$code->call( %params )
Calls one invocation of the contained function code block. See the "call" method on "IO::Async::Function" for more detail.
$code->shutdown
This method requests that the detached worker processes stop running.
$n_workers = $code->workers
This method in scalar context returns the number of workers currently running.
@worker_pids = $code->workers
This method in list context returns a list of the PID numbers of all the currently running worker processes.
AUTHOR
Paul Evans <leonerd@leonerd.org.uk>
perl v5.14.2 2012-10-24 IO::Async::DetachedCode(3pm)