This approach may be more efficient than others for large files and the pattern found towards the end of the file, as tac opens the file from the end (output of strace):
The speed-up by seeking to end may be offset somewhat by:
1) In this situation tac is used twice,
2) There is a lot of manipulation going on, including RE matches in some cases,
If we are curious we'd benchmark it, of course
I still like the simplicity, however, regardless of what happens under the hood ... cheers, drl
On Unix, it is easy to get those lines that match a pattern, by
grep pattern file
or those lines that do not, by
grep -v pattern file
but I am editing a file on Windows with Ultraedit.
Ultraedit support regular expression based search and replace.
I can delete all the lines that match a... (1 Reply)
I have a text file, a sample of which is as follows:
r/- * 0: WINDOWS/Microsoft.NET/Framework/v2.0.50727/ASP.NETWebAdminFiles/Images/headerGRADIENT_Tall.gif
r/- * 0: WINDOWS/SoftwareDistribution/Download/cf8ec753e88561d2ddb53e183dc05c3e/backoff.jpg
r/- * 0: ... (2 Replies)
Hi All,
Below is my requirement. Whatever coming in between ' ', needs to delete.
Input File Contents:
==============
This is nice 'boy'
This 'is
bad
boy.' Got it
Expected Output
===========
This is nice
This
Got it (4 Replies)
I want to replace a certain pattern with the variable already defined.
e.g.
set path_verilog = /home/priya/bin/verilogfile
my file contents are :
verilog new
verilog is defined here verilog_path_comes
I am using the below command
sed 's/verilog_path_comes/'$path_verilog'/g' <filename>... (2 Replies)
Hello sed gurus. I am using ksh on Sun and have a file created by concatenating several other files. All files contain header rows. I just need to keep the first occurrence and remove all other header rows.
header for file
1111
2222
3333
header for file
1111
2222
3333
header for file... (8 Replies)
i have a file sample.txt containing
i want to delete lines starting with 123 neglecting spaces and tabs.
but not lines containing 123. i.e.
i want files sample.txt as
help me
thanxx (4 Replies)
Hello,
I am having hard time figuring out how to print/delete the lines between two pattern. Here is the part of the file nastran1.bdf:
RBE3 48729 32232 123456 0.30000 123 59786 59787
60114
RBE3 48732 1330 123 0.30000 123 10107... (4 Replies)
Hi,
i need help to delete all the lines between 2 matched patterns and the first pattern must be deleted too. sample as follows:
inputfile.txt
>kump_1
...........................
...........................
>start_0124
dgfhghgfh
fgfdgfh
fdgfdh
>kump_2
............................. (7 Replies)
The intended result should be :
PDF converters
'empty line'
gpdftext and pdftotext?xml version="1.0"?>
xml:space="preserve"><note-content version="0.1" xmlns:/tomboy/link" xmlns:size="http://beatniksoftware.com/tomboy/size">PDF converters
gpdftext and pdftotext</note-content>... (9 Replies)
Hi
I need to delete duplicate like pattern lines from a text file containing 2 duplicates only (one being subset of the other) using sed or awk preferably.
Input:
FM:Chicago:Development
FM:Chicago:Development:Score
SR:Cary:Testing:Testcases
PM:Newyork:Scripting
PM:Newyork:Scripting:Audit... (6 Replies)
Discussion started by: tech_frk
6 Replies
LEARN ABOUT DEBIAN
chart::clicker::renderer::line
Chart::Clicker::Renderer::Line(3pm) User Contributed Perl Documentation Chart::Clicker::Renderer::Line(3pm)NAME
Chart::Clicker::Renderer::Line - Line renderer
VERSION
version 2.83
SYNOPSIS
my $lr = Chart::Clicker::Renderer::Line->new(
brush => Graphics::Primitive::Brush->new({
#...
})
);
DESCRIPTION
Chart::Clicker::Renderer::Line renders a dataset as lines.
ATTRIBUTES
additive
If true, the lines are drawn "stacked", each key accumulates based on those drawn below it.
brush
Set/Get a brush to be used for the lines.
shape
Set a shape object to draw at each of the data points. Adding a shape results in:
shape_brush
Set/Get the brush to be used on the shapes at each point. If no shape_brush is provided, then the shapes will be filled. The brush allows
you to draw a "halo" around each shape. This sometimes help to separate the points from the lines and make them more distinct.
METHODS
draw_point
Called for each point encountered on the line.
AUTHOR
Cory G Watson <gphat@cpan.org>
COPYRIGHT AND LICENSE
This software is copyright (c) 2012 by Cold Hard Code, LLC.
This is free software; you can redistribute it and/or modify it under the same terms as the Perl 5 programming language system itself.
perl v5.14.2 2012-06-22 Chart::Clicker::Renderer::Line(3pm)
09-26-2017
