Display only lines with one MODE
Display only lines with two MODE
Display any line that do not have only two MODE
Display any line with zero or one MODE
Hi
I need a perl onliner which seaches a line starting with a pattern(last occurence) and display it.
similar to
grep 'pattern' filename | tail -1 in UNIX
Ex: I want to display the line starting with "cool" and which is a last occurence
adadfadafadf
adfadadf
cool dfadfadfadfara... (4 Replies)
I would like to use sed to replace one occurence of a pattern in a file. When I use the s/// command it replaces all occurences of the pattern in the file. Should I be using something other than sed?
Thanks (6 Replies)
hi,
is it possible to find the number of occurences of a pattern between two paranthesis.
for e.g
i have a file as below.
>>{
>>hi
>>GoodMorning
>>how are you?
>>}
>>is it good,
>>tell me yes, if it is good
In the above file, its clear the occurence of word "Good"... (17 Replies)
Hi
I have to replace a pattern found in the first uncommented line in a file. The challenge I'm facing is there are several such similar lines but I have to edit only the first uncommented line.
Eg:
#this is example
#/root/xyz:Old_Pattern
/root/xyz:Old_Pattern
/root/xyz:Old_Pattern
... (10 Replies)
Hi,
Do anybody know how to use awk to count the pattern at specific column?
Input file
M2A928K 419 ath-miR159a,gma-miR159a-3p,ptc-miR159a 60 miR235a
.
.
Output file
M2A928K 419 ath-miR159a,gma-miR159a-3p,ptc-miR159a 60 miR235a 3
.
.
I plan to count how many "miR" in column 3... (2 Replies)
Hi,
I have a simple problem but i guess stupid enough to figure it out. i have thousands rows of data. and i need to find match patterns of two columns and print the number of rows. for example:
inputfile
abd abp 123
abc abc 325
ndc ndc 451
mjk lkj... (3 Replies)
I have a large file and many lines are duplicated. I'm trying to delete lines with every second occurrence of a pattern. Did tried searching similar question but no luck.
I can delete all lines matching pattern with :g/pattern/d but don't want to lose data.
Sample pattern to delete... (6 Replies)
Hello.
Here is a file contents :
declare -Ax NEW_FORCE_IGNORE_ARRAY=(="§" ="§" ="§" ="§" ="§" .................. ="§"Here is a pattern
=I want to extract 'NEW_FORCE_IGNORE_ARRAY' which is the whole word before the first occurrence of pattern '='
Is there a better solution than mine :... (3 Replies)
Discussion started by: jcdole
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)