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UNIX for Dummies Questions & Answers
Perl Meta character understanding
Post 302445983 by Ikon on Tuesday 17th of August 2010 09:51:08 AM
08-17-2010
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8 More Discussions You Might Find Interesting
1. Shell Programming and Scripting
In this script I have, it says press Ctrl+W+? for help, but it doesn't do anything. I looked in the script and it binds: bind ^W meta2_character. How do I make it the Ctrl button so I can do Ctrl+W? (There are some other commands that use Ctrl+W+another character/letter/number.) (4 Replies)
Discussion started by: guitarscn
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2. UNIX for Dummies Questions & Answers
Hi,
I am learning reg exp a bit :)
Meta char info:
{n,m} Matches the preceding character at least n times but not more than m times, for example, 'ba{2,3}b' will find 'baab' and 'baaab' but NOT 'bab' or 'baaaab'. Values are enclosed in braces (curly brackets).
Input file:
112
11112... (2 Replies)
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3. Shell Programming and Scripting
Hi All,
Can you please help me interpret the following command. Which I am not able to understand. Also can you please illustrate what it is used for.
perl -pi -e 's/\015//g' text_file.dat
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4. UNIX for Dummies Questions & Answers
p { margin-bottom: 0.08in; } How to match all files that end with the release number using the { } meta character in /boot. (2 Replies)
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5. Shell Programming and Scripting
Hi guys,
Here is the code:
my @allwords = ();
my %seen=();
foreach my $curr (@allwords) {
$seen{$curr} = 1;
}
@allwords = keys %seen;
my question is: what will @allwords now contain, or how would the entries in the @allwords array be different after this manipulation?
Thank... (3 Replies)
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6. Shell Programming and Scripting
can someone help me how to interpret this line?
my ($class, $hashref) = @_;
my $portfolio = {};
if ($hashref->{portfolio_id}) {
($portfolio) = GEmySQL->get ("select * from portfolio where portfolio.id=$hashref->{portfolio_id}");
}
===============
Question: how do... (2 Replies)
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Well, I found myself trying to fix some Perl code (Ive never done any Perl in my life) and I pinpointed the place where the bug could be. But to be sure I have to know what does a few line of code mean:
$files_lim =~ (/^\d*$/)
$files_lim =~ (/^\d*h$/)
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Hi,
I need to understand below perl code, can some one advise me.
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LEARN ABOUT DEBIAN
input
INPUT(5) File Formats Manual INPUT(5) NAME
input - input data file format DESCRIPTION
This manual page describes the output format of the file created by the Yagi-Uda project input or first programs. The file is an ASCII file, so can be edited manually if required. It is read by yagi or optimise. The program optimise also creates the same file format. NOTES FREQUENCY MIN_FREQUENCY MAX_FREQUENCY STEP_FREQUENCY ELEMENTS DRIVEN PARASITIC ANGULAR_STEP DATA_DRIVEN DATA_PARASITIC The # is used as a comment. A typical file, for an antenna designed for the 2m amateur band (144-146 MHz) might be as shown below. Note: 1) Reflector is at position 0.0 2) All elements lengths/positions are in m. NOTES This line can be up to 400 characters. FREQUENCY 145.000000 MIN_FREQUENCY 144.000000 MAX_FREQUENCY 146.000000 STEP_FREQUENCY 0.100000 ELEMENTS 10 DRIVEN 1 PARASITIC 9 ANGULAR_STEP 180.000000 #DATA_DRIVEN x y length diameter voltage phase DATA_DRIVEN 0.30993 0.000000 1.002492 0.0063000000000000 1.000000 0.000000 # DATA_PARASITIC x y length diameter DATA_PARASITIC 0.00000 0.00000 1.01902 0.00630 0.49859 0.00000 0.95551 0.00630 1.07338 0.00000 0.93595 0.00630 1.81020 0.00000 0.92050 0.00630 2.58152 0.00000 0.91322 0.00630 3.30390 0.00000 0.91243 0.00630 4.03692 0.00000 0.90423 0.00630 4.64108 0.00000 0.89081 0.00630 5.37418 0.00000 0.83912 0.00630 FILES
filename ASCII description of antenna. filename.out binary file SEE ALSO
yagi(1), output(1), input(1), optimise(1), first(1) and yagi(5). AUTHORS
Dr. David Kirkby G8WRB (david.kirkby@onetel.net), with help with converting to DOS from Dr. Joe Mack NA3T (mack@fcrfv2.ncifcrf.gov). Yagi version 1.16 24th October 2000 INPUT(5)