Hi, experts,
I would like to create a function that can calculate the total number of lines in a saved text file and delete specific lines in that particular file (I only want the last few lines). Hav anybody have the experience and giv me a hand in this? (9 Replies)
Hi, I'm a bit of sed n00b here.
My issue is as follows:
I'm trying to pass a variable to sed so that all instances of this variable (in a text file) will be replaced with nothing. However, the value of this variable will always be a folder location e.g. "C:\Program Files\Folder1"
I... (5 Replies)
Hi
I want to extract certain text between two line numbers like
23234234324 and
54446655567567
How do I do this with a simple sed or awk command?
Thank you.
---------- Post updated at 06:16 PM ---------- Previous update was at 05:55 PM ----------
found it:
sed -n '#1,#2p'... (1 Reply)
I am attempting to insert multiple lines of text into a specific place in a text file based on the lines above or below it.
For example, Here is a portion of a zone file.
IN NS ns1.domain.tld.
IN NS ns2.domain.tld.
IN ... (2 Replies)
Hi All,
I need read the file and out put format as below using ksh, I wrote below script its keep on repeating first line in the file.
may i know the best way to get the below out put while incrementing line in the file.
cat b.txt |awk '{print $0}' |while read line
do
aa=`cat $line |head -1... (7 Replies)
this is Korn shell unix.
The scenario is I have a pipe delimited text file which needs to be customized. say for example,I have a pipe delimited text file with 15 columns(| delimited) and 200 rows. currently the 11th and 12th column has null values for all the records(there are other null columns... (4 Replies)
Hello All,
this is my first post so I don't know if I am doing this right.
I would like to append entries from a series of strings (contained in a text file) consecutively at the end of specifically labeled lines in another file.
As an example:
- the file that contains the values to be... (3 Replies)
Hi,
I'm trying to search for some number and from that line, i need to delete the 5th line exactly.
Eg:
Consider below as text file data:
10000
a
b
c
d
e
.
.
.
10000
w
q
t (8 Replies)
In the below file I am trying to grep or similar, all lines where only AF= is less than 0.4.. Thank you :).
grep
grep "AF=" ,+ .4 file
file
12 112036782 . T C 34.0248 PASS ... (3 Replies)
Discussion started by: cmccabe
3 Replies
LEARN ABOUT DEBIAN
io::async::protocol::linestream
IO::Async::Protocol::LineStream(3pm) User Contributed Perl Documentation IO::Async::Protocol::LineStream(3pm)NAME
"IO::Async::Protocol::LineStream" - stream-based protocols using lines of text
SYNOPSIS
Most likely this class will be subclassed to implement a particular network protocol.
package Net::Async::HelloWorld;
use strict;
use warnings;
use base qw( IO::Async::Protocol::LineStream );
sub on_read_line
{
my $self = shift;
my ( $line ) = @_;
if( $line =~ m/^HELLO (.*)/ ) {
my $name = $1;
$self->invoke_event( on_hello => $name );
}
}
sub send_hello
{
my $self = shift;
my ( $name ) = @_;
$self->write_line( "HELLO $name" );
}
This small example elides such details as error handling, which a real protocol implementation would be likely to contain.
DESCRIPTION EVENTS
The following events are invoked, either using subclass methods or CODE references in parameters:
on_read_line $line
Invoked when a new complete line of input is received.
PARAMETERS
The following named parameters may be passed to "new" or "configure":
on_read_line => CODE
CODE reference for the "on_read_line" event.
METHODS
$lineprotocol->write_line( $text )
Writes a line of text to the transport stream. The text will have the end-of-line marker appended to it; $text should not end with it.
AUTHOR
Paul Evans <leonerd@leonerd.org.uk>
perl v5.14.2 2012-10-24 IO::Async::Protocol::LineStream(3pm)
01-21-2019
