Display all of the lines in a file that contain "Raspberry" followed later
in the line by the letter "a"
I tried: grep Raspberry*a filename
that didn't work
Anyone know a solution? (1 Reply)
Hi guys
I've been trying to write a regular expression.
If I'm tryin to validate a sequence of characters as follows...
AB1-232-623482-743 43/3
where
a) any character after the "AB" can be any alphanumeric character
b) the " 43/3" part is optional
is there a quick neat way for me... (5 Replies)
could anybody tell me how i can add/append a new line using regular expression in vi on AIX?
i've tried several ways before, but all of them failed. e.g.
:%s/$/\n/
:%s/^/\v\r/
:( (1 Reply)
Hello!
I'm working with AWK, and i have this code:
/<LOOP_TIME>/,/<\/LOOP_TIME>/
I want that match every everything between <LOOP_TIME> and </LOOP_TIME>, but not if the line have a "#" before the tags.
Someone can help me?
Thanks! (6 Replies)
Hi,
I have script which will take a string as input and search in a file.
But when I want to search a pattern which has special characters script is ignoring it.
For example: I want to search a pattern "\.tumblr\.com". shell script is removing \ (backslah) and trying to search... (7 Replies)
Witam, mam oto taki ciąg znaków:
8275610268 + 9012383215 =niepotrzebnytextPotrzebuję w bash'u wyciągnąć obie liczby (mają taką samą liczbę cyfr), zapisać je do osobnych zmiennych, ale coś nie idzie, kombinowałem z grepem, ale nie potrafię skleić tego wyrażenia regularnego, no i potem przypisać do... (7 Replies)
Hello,
I would like to replace Line 187 of my file named run_example.
The original line is below, including the spaces:
celldm(1) = 6.00,
I want it to become something like
celldm(1) = 6.05,
or
celldm(1) = 6.10,
where the number is stored in a variable called... (6 Replies)
I have two input files (given below) and to compare each line of the File1 with each line of File2 starts with '>sample1'. If a match occurs and that matched line in the File2 contains another line or sequence of lines starting with "Chr" they have to be displayed in output file with that sample.... (8 Replies)
Hi all,
How am I read a file, find the match regular expression and overwrite to the same files.
open DESTINATION_FILE, "<tmptravl.dat" or die "tmptravl.dat";
open NEW_DESTINATION_FILE, ">new_tmptravl.dat" or die "new_tmptravl.dat";
while (<DESTINATION_FILE>)
{
# print... (1 Reply)
Hi,
I have a file with two fields in it as shown below
14,30
28,30
16,30
22,30
21,30
3,30
Fields are separated by comma ",".
I've been trying to validate the file based on the condition "each field must be a numeric value"
I am using HP-UX OS.
I have tried the following awk... (4 Replies)
Discussion started by: meetsriharsha
4 Replies
LEARN ABOUT DEBIAN
graphviz::regex
GraphViz::Regex(3pm) User Contributed Perl Documentation GraphViz::Regex(3pm)NAME
GraphViz::Regex - Visualise a regular expression
SYNOPSIS
use GraphViz::Regex;
my $regex = '(([abcd0-9])|(foo))';
my $graph = GraphViz::Regex->new($regex);
print $graph->as_png;
DESCRIPTION
This module attempts to visualise a Perl regular expression. Understanding regular expressions is tricky at the best of times, and regexess
almost always evolve in ways unforseen at the start. This module aims to visualise a regex as a graph in order to make the structure clear
and aid in understanding the regex.
The graph visualises how the Perl regular expression engine attempts to match the regex. Simple text matches or character classes are
represented by.box-shaped nodes. Alternations are represented by a diamond-shaped node which points to the alternations. Repetitions are
represented by self-edges with a label of the repetition type (the nodes being repeated are pointed to be a full edge, a dotted edge points
to what to match after the repetition). Matched patterns (such as $1, $2, etc.) are represented by a 'START $1' .. 'END $1' node pair.
This uses the GraphViz module to draw the graph.
METHODS
new
This is the constructor. It takes one mandatory argument, which is a string of the regular expression to be visualised. A GraphViz object
is returned.
my $graph = GraphViz::Regex->new($regex);
as_*
The regex can be visualised in a number of different graphical formats. Methods include as_ps, as_hpgl, as_pcl, as_mif, as_pic, as_gd,
as_gd2, as_gif, as_jpeg, as_png, as_wbmp, as_ismap, as_imap, as_vrml, as_vtx, as_mp, as_fig, as_svg. See the GraphViz documentation for
more information. The two most common methods are:
# Print out a PNG-format file
print $g->as_png;
# Print out a PostScript-format file
print $g->as_ps;
BUGS
Note that this module relies on debugging information provided by Perl, and is known to fail on at least two versions of Perl: 5.005_03 and
5.7.1. Sorry about that - please use a more recent version of Perl if you want to use this module.
AUTHOR
Leon Brocard <acme@astray.com>
COPYRIGHT
Copyright (C) 2000-1, Leon Brocard
This module is free software; you can redistribute it or modify it under the same terms as Perl itself.
perl v5.14.2 2012-04-02 GraphViz::Regex(3pm)