6 More Discussions You Might Find Interesting
1. Shell Programming and Scripting
Hello,
This post is already here but want to do this with another way
Merge multiples files with multiples duplicates keys by filling "NULL" the void columns for anothers joinning files
file1.csv:
1|abc
1|def
2|ghi
2|jkl
3|mno
3|pqr
file2.csv:
1|123|jojo
1|NULL|bibi... (2 Replies)
Discussion started by: yjacknewton
2 Replies
2. UNIX for Dummies Questions & Answers
Hi,
I have 20 tab delimited text files that have a common column (column 1). The files are named GSM1.txt through GSM20.txt. Each file has 3 columns (2 other columns in addition to the first common column).
I want to write a script to join the files by the first common column so that in the... (5 Replies)
Discussion started by: evelibertine
5 Replies
3. Solaris
After a memory upgrade all network interfaces are misconfigued. How do i resolve this issue. Below are some out puts.thanks.
ifconfig: plumb: SIOCLIFADDIF: eg000g0:2: no such interface
# ifconfig eg1000g0:2 plumb
ifconfig: plumb: SIOCLIFADDIF: eg1000g0:2: no such interface
# ifconfig... (2 Replies)
Discussion started by: andersonedouard
2 Replies
4. UNIX for Dummies Questions & Answers
Hello,
My apologies if this has been posted elsewhere, I have had a look at several threads but I am still confused how to use these functions. I have two files, each with 5 columns:
File A: (tab-delimited)
PDB CHAIN Start End Fragment
1avq A 171 176 awyfan
1avq A 172 177 wyfany
1c7k A 2 7... (3 Replies)
Discussion started by: InfoSeeker
3 Replies
5. Programming
example sql:
select a.a1,b.b1,c.c1,d.d1,e.e1
from a
left outer join b on a.x=b.x
left outer join c on b.y=c.y
left outer join d on d.z=a.z
inner join a.t=e.t
I know how single outer or inner join works in sql.
But I don't really understand when there are multiple of them.
can... (0 Replies)
Discussion started by: robbiezr
0 Replies
6. Shell Programming and Scripting
Hi,
I am a new learner of join command. Some result really make me confused.
Please kindly help me.
input:
file1:
LEO oracle engineer 210375
P.Jones Office Runner ID897
L.Clip Personl Chief ID982
S.Round UNIX admin ID6
file2:
Dept2C ID897 6 years
Dept5Z ID982 1 year
Dept3S ID6 2... (1 Reply)
Discussion started by: summer_cherry
1 Replies
LEARN ABOUT SUSE
thread::semaphore
Thread::Semaphore(3pm) Perl Programmers Reference Guide Thread::Semaphore(3pm)
NAME
Thread::Semaphore - Thread-safe semaphores
VERSION
This document describes Thread::Semaphore version 2.09
SYNOPSIS
use Thread::Semaphore;
my $s = Thread::Semaphore->new();
$s->down(); # Also known as the semaphore P operation.
# The guarded section is here
$s->up(); # Also known as the semaphore V operation.
# The default semaphore value is 1
my $s = Thread::Semaphore-new($initial_value);
$s->down($down_value);
$s->up($up_value);
DESCRIPTION
Semaphores provide a mechanism to regulate access to resources. Unlike locks, semaphores aren't tied to particular scalars, and so may be
used to control access to anything you care to use them for.
Semaphores don't limit their values to zero and one, so they can be used to control access to some resource that there may be more than one
of (e.g., filehandles). Increment and decrement amounts aren't fixed at one either, so threads can reserve or return multiple resources at
once.
METHODS
->new()
->new(NUMBER)
"new" creates a new semaphore, and initializes its count to the specified number (which must be an integer). If no number is
specified, the semaphore's count defaults to 1.
->down()
->down(NUMBER)
The "down" method decreases the semaphore's count by the specified number (which must be an integer >= 1), or by one if no number
is specified.
If the semaphore's count would drop below zero, this method will block until such time as the semaphore's count is greater than or
equal to the amount you're "down"ing the semaphore's count by.
This is the semaphore "P operation" (the name derives from the Dutch word "pak", which means "capture" -- the semaphore operations
were named by the late Dijkstra, who was Dutch).
->up()
->up(NUMBER)
The "up" method increases the semaphore's count by the number specified (which must be an integer >= 1), or by one if no number is
specified.
This will unblock any thread that is blocked trying to "down" the semaphore if the "up" raises the semaphore's count above the
amount that the "down" is trying to decrement it by. For example, if three threads are blocked trying to "down" a semaphore by
one, and another thread "up"s the semaphore by two, then two of the blocked threads (which two is indeterminate) will become
unblocked.
This is the semaphore "V operation" (the name derives from the Dutch word "vrij", which means "release").
NOTES
Semaphores created by Thread::Semaphore can be used in both threaded and non-threaded applications. This allows you to write modules and
packages that potentially make use of semaphores, and that will function in either environment.
SEE ALSO
Thread::Semaphore Discussion Forum on CPAN: http://www.cpanforum.com/dist/Thread-Semaphore <http://www.cpanforum.com/dist/Thread-Semaphore>
Annotated POD for Thread::Semaphore: http://annocpan.org/~JDHEDDEN/Thread-Semaphore-2.09/lib/Thread/Semaphore.pm
<http://annocpan.org/~JDHEDDEN/Thread-Semaphore-2.09/lib/Thread/Semaphore.pm>
Source repository: http://code.google.com/p/thread-semaphore/ <http://code.google.com/p/thread-semaphore/>
threads, threads::shared
MAINTAINER
Jerry D. Hedden, <jdhedden AT cpan DOT org>
LICENSE
This program is free software; you can redistribute it and/or modify it under the same terms as Perl itself.
perl v5.12.1 2010-04-26 Thread::Semaphore(3pm)