Thanks for you guys reply my question. all methods are work.
I have one more question. I need get value from another file and replace the current file.
I tried
Id like to delete a line from a file using (preferably a single line unix command) if it contains a certain string pattern.
If line contains "abcdef" then delete that line.
Help greatly appreciated. (7 Replies)
Hi Everyone,
I have:
$val="QQ3_1899_CD4".
The output will be:
1899.
I did $val =~ /(\d+)/g; the output is 318994, then i use substr to get those 1899. This is not efficient.
Is any simple way, like just one line can do? Thanks (1 Reply)
Can someone tell me how I can do this?
e.g:
Say file1.txt contains:
today is monday
the 22 of
NOVEMBER
2010
and file2.txt contains:
the
11th
month
of
How do i replace the word NOVEMBER with (5 Replies)
I have a list of strings in file:
10 10 AAA
120 13 BBBBB
23 11 CCCCC
11 32 DDDDDD
I want to replace first column of the text such as: 10, 129, 23, 11 with 11, 22, 33, 44.
I can do line by line, but just not sure how to replace partial string without... (1 Reply)
Hi,
I am facing issue while reading data from a file in UNIX. my requirement is to compare two files and for the text pattern matching in the 1st file, replace the contents in second file by the contents of first file from start to the end and write the contents to thrid file.
i am able to... (2 Replies)
Hi, I have a tab delimited text file like this one. I need to do a partial match of a particular cell and then replace matches with an empty cell. So here is a sample:
Smith FordMustang ChevroletCamaro
Miller FordFiesta
Jones KiaSorrento
Davis ChevroletCamaro
Johnson ToyotaHighlander
I... (4 Replies)
I have a file comp.pkglist which mention package version and release . In 'version change' and 'release change' line there are two versions 'old' and 'new' Version Change: --> Release Change: -->
cat comp.pkglist
Package list: nss-util-devel-3.28.4-1.el6_9.x86_64
Version Change: 3.28.4 -->... (1 Reply)
I have the below string which i need to compare with a file and replace this string in the file which matches closely. Can anyone help me on this.
string(Scenario 1)- user::r--,user::ourfrd:r--
String(Scenario 2)- user::r--
File
****
# file: /local/Desktop/myfile
# owner: me
# group:... (6 Replies)
Discussion started by: sarathy_a35
6 Replies
LEARN ABOUT DEBIAN
io::async::signal
IO::Async::Signal(3pm) User Contributed Perl Documentation IO::Async::Signal(3pm)NAME
"IO::Async::Signal" - event callback on receipt of a POSIX signal
SYNOPSIS
use IO::Async::Signal;
use IO::Async::Loop;
my $loop = IO::Async::Loop->new;
my $signal = IO::Async::Signal->new(
name => "HUP",
on_receipt => sub {
print "I caught SIGHUP
";
},
);
$loop->add( $signal );
$loop->run;
DESCRIPTION
This subclass of IO::Async::Notifier invokes its callback when a particular POSIX signal is received.
Multiple objects can be added to a "Loop" that all watch for the same signal. The callback functions will all be invoked, in no particular
order.
EVENTS
The following events are invoked, either using subclass methods or CODE references in parameters:
on_receipt
Invoked when the signal is received.
PARAMETERS
The following named parameters may be passed to "new" or "configure":
name => STRING
The name of the signal to watch. This should be a bare name like "TERM". Can only be given at construction time.
on_receipt => CODE
CODE reference for the "on_receipt" event.
Once constructed, the "Signal" will need to be added to the "Loop" before it will work.
AUTHOR
Paul Evans <leonerd@leonerd.org.uk>
perl v5.14.2 2012-10-24 IO::Async::Signal(3pm)