Hi,
I have a shell script that returns 10 records for the column Name and age from a select query. Where when i store those data in retrieve_list.txt file i need to store the data in a particular format like:-
$Jason$30
$Bill$23
$Roshan$25
Here is my script:
1)... (15 Replies)
Hi Friends,
Can u please help mw with the following query .
I need to run a database sql statement to select particular fields from a table.I need to store the retrieved filed values into variables so that i can print it in a specific format. But the particular select query retrieves more... (12 Replies)
Hi
I need to execute a select statement in a solaris environment with oracle database. The select statement returns number of rows of data.
I need the data to be inserted into a CSV file with proper format. For that we normally use "You have to select all your columns as one big string,... (2 Replies)
Hi!
My data file contains a two columns list. It looks like:
1 3.789
2 6.789
3 7.890
4 8.900
5 6.789
6 1.987
7 10.987
8 2.987
9 0.987
I would like to create a new list using the awk command, just selecting data from the second column but also printing the first column.
Let say I select... (3 Replies)
Hey guys,
Is it possible to have a worker thread send data out a TCP connection while another thread is waiting using using select() on that same connection?
If not, then what is the correct way to maintain a connection, react to incoming data, and send data over a TCP connection?
Thanks... (16 Replies)
I would like to recover the data from 3 text tags.
These three markers are located between the tags specific location <tag1> and </tag1> knowing that they are in many places.
In File.txt:
<tag2>txt2</tag2>
<tag3>txt3</tag3>
<tag4>txt4</tag4>
....
<tag1>
<tag2>txt2</tag2>... (3 Replies)
Hello all,
Once again I need to call upon the masters for help. I have a file called endpoint_data. IN that file I have groups of endpoints. However all I need from the file is this....
ENDPOINT NAME = SIPWOODSBC
SIG PRI FQDN/IP ADDRESS/DOMAIN NAME = 10.xxx.xxx.xxx
SIG SEC... (4 Replies)
Hi all,
I am new to AWK and I am trying to solve a problem that is probably easy for an expert. Suppose I have the following data file input.txt:
20 35 43
20 23 54
20 62 21
20.5 43 12
20.5 33 11
20.5 89 87
21 33 20
21 22 21
21 56 87
I want to select from all lines having the... (4 Replies)
Hi All,
I need to remove all files except the most update data based on date on filename
Input
data_AIDS_20150312.txt
data_AIDS_20150311.txt
data_AIDS_20150411.txt
data_AIDS_20140312.txt
the most updated data is data_AIDS_20150411.txt, so I'll remove other files. My expected output... (3 Replies)
I wish to use AWK to do something akin: Select all 2D data with 1<$1<2 and -7.5<$2<-6.5
But it's not working
awk 'END {print ($1<=2&&$1>=1&&$2<=-6.5&&$2>=-7.5)}' bla
Data:
-1.06897 -8.04482 -61.469
-1.13613 -8.04482 -61.2271
-1.00182 -8.04482 -61.2081
-1.06897 -8.13518 -60.8544... (2 Replies)
Discussion started by: chrisjorg
2 Replies
LEARN ABOUT MOJAVE
io::select
IO::Select(3pm) Perl Programmers Reference Guide IO::Select(3pm)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 <perlbug@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 v5.18.2 2014-01-06 IO::Select(3pm)