I have a problem with the sort command:
When I run the following in a shell, it works fine:
I tried it under severel shells: c-shell, borne-shell, bash
I get the output I want to have.
But when I use it in my script, I get a mysterious error: I have a menu like this one:
No I sayed 1 for example - and then there is an unending loop of the asterisk-option:
(When I sayed 1, I get the normal output)
hello
i have a requirement where i have a direcotry in which i get files in the format
STOCKS.20080114.dat
STOCKS.20080115.dat
STOCKS.20080117.dat
STOCKS.20080118.dat
i need to loop through the directory and sort by create date descending order and i need to process the first file.
... (1 Reply)
Here is my dilemma.
I have a file that looks something like this
name: Type1 group: Group1
name: Type1 group: Group2
name: Type1 group: Group3
name: Type2 group: Group3
name: Type2 group: Group2
name: Type2 group: Group4
name: Type3 ... (7 Replies)
Hi to all.
I'm trying to sort this with the Unix command sort.
user1:12345678:3.5:2.5:8:1:2:3
user2:12345679:4.5:3.5:8:1:3:2
user3:12345687:5.5:2.5:6:1:3:2
user4:12345670:5.5:2.5:5:3:2:1
user5:12345671:2.5:5.5:7:2:3:1
I need to get this:
user3:12345687:5.5:2.5:6:1:3:2... (7 Replies)
Hello all -
I am to this forum and fairly new in learning unix and finding some difficulty in preparing a small shell script. I am trying to make script to sort all the files given by user as input (either the exact full name of the file or say the files matching the criteria like all files... (3 Replies)
sort --random-sort
The full command is
path=`find /testdir -maxdepth 1 -mindepth 1 -type d | ***Some sort of sort function*** | head -1`
I have a list I want to randomly sort. It works fine in ubuntu but on a 'osx lion' sort dosen't have the --random-sort option.
I don't want to... (5 Replies)
Input file:
100%ABC2 3.44E-12 USA
A2M%H02579 0E0 UK
100%ABC2 5.34E-8 UK
100%ABC2 3.25E-12 USA
A2M%H02579 5E-45 UK
Output file:
100%ABC2 3.44E-12 USA
100%ABC2 3.25E-12 USA
100%ABC2 5.34E-8 UK
A2M%H02579 0E0 UK
A2M%H02579 5E-45 UK
Code try:
sort -k1,1 -g -k2 -r input.txt... (2 Replies)
Hi Experts,
I have a filelist collected from another server , now want to sort the output using date/time stamp filed.
- Filed 6, 7,8 are showing the date/time/stamp.
Here is the input:
#----------------------------------------------------------------------
-rw------- 1 root ... (3 Replies)
Hi,
Could anyone kindly show me a link or explain the difference between
sort -n -k2 -k3 & sort -n -k2,3
Also, if I like to remove the row with repetition at both $2 and $3, Can I safely use
sort -u -k2 -k3
Example;
100 20 30
100 20 30
So, both $2 and $3 are same and I... (2 Replies)
How to sort the following output based on lowest to highest BE?
The following sort does not work.
$ sort -t. -k1,1n -k2,2n bfd.txt
BE31.116 0s 0s DOWN DAMP
BE31.116 0s 0s DOWN DAMP
BE31.117 0s 0s ... (7 Replies)
Discussion started by: sand1234
7 Replies
LEARN ABOUT DEBIAN
io::select
IO::Select(3perl) Perl Programmers Reference Guide IO::Select(3perl)NAME
IO::Select - OO interface to the select system call
SYNOPSIS
use IO::Select;
$s = IO::Select->new();
$s->add(*STDIN);
$s->add($some_handle);
@ready = $s->can_read($timeout);
@ready = IO::Select->new(@handles)->can_read(0);
DESCRIPTION
The "IO::Select" package implements an object approach to the system "select" function call. It allows the user to see what IO handles, see
IO::Handle, are ready for reading, writing or have an exception pending.
CONSTRUCTOR
new ( [ HANDLES ] )
The constructor creates a new object and optionally initialises it with a set of handles.
METHODS
add ( HANDLES )
Add the list of handles to the "IO::Select" object. It is these values that will be returned when an event occurs. "IO::Select" keeps
these values in a cache which is indexed by the "fileno" of the handle, so if more than one handle with the same "fileno" is specified
then only the last one is cached.
Each handle can be an "IO::Handle" object, an integer or an array reference where the first element is an "IO::Handle" or an integer.
remove ( HANDLES )
Remove all the given handles from the object. This method also works by the "fileno" of the handles. So the exact handles that were
added need not be passed, just handles that have an equivalent "fileno"
exists ( HANDLE )
Returns a true value (actually the handle itself) if it is present. Returns undef otherwise.
handles
Return an array of all registered handles.
can_read ( [ TIMEOUT ] )
Return an array of handles that are ready for reading. "TIMEOUT" is the maximum amount of time to wait before returning an empty list,
in seconds, possibly fractional. If "TIMEOUT" is not given and any handles are registered then the call will block.
can_write ( [ TIMEOUT ] )
Same as "can_read" except check for handles that can be written to.
has_exception ( [ TIMEOUT ] )
Same as "can_read" except check for handles that have an exception condition, for example pending out-of-band data.
count ()
Returns the number of handles that the object will check for when one of the "can_" methods is called or the object is passed to the
"select" static method.
bits()
Return the bit string suitable as argument to the core select() call.
select ( READ, WRITE, EXCEPTION [, TIMEOUT ] )
"select" is a static method, that is you call it with the package name like "new". "READ", "WRITE" and "EXCEPTION" are either "undef"
or "IO::Select" objects. "TIMEOUT" is optional and has the same effect as for the core select call.
The result will be an array of 3 elements, each a reference to an array which will hold the handles that are ready for reading, writing
and have exceptions respectively. Upon error an empty list is returned.
EXAMPLE
Here is a short example which shows how "IO::Select" could be used to write a server which communicates with several sockets while also
listening for more connections on a listen socket
use IO::Select;
use IO::Socket;
$lsn = IO::Socket::INET->new(Listen => 1, LocalPort => 8080);
$sel = IO::Select->new( $lsn );
while(@ready = $sel->can_read) {
foreach $fh (@ready) {
if($fh == $lsn) {
# Create a new socket
$new = $lsn->accept;
$sel->add($new);
}
else {
# Process socket
# Maybe we have finished with the socket
$sel->remove($fh);
$fh->close;
}
}
}
AUTHOR
Graham Barr. Currently maintained by the Perl Porters. Please report all bugs to <perl5-porters@perl.org>.
COPYRIGHT
Copyright (c) 1997-8 Graham Barr <gbarr@pobox.com>. All rights reserved. This program is free software; you can redistribute it and/or
modify it under the same terms as Perl itself.
perl v5.14.2 2011-09-19 IO::Select(3perl)