nice, what id I have missing lines or columns in the data. What is the syntax to shift to next element/key if one is missing while still separating by every new line?
Hello Experts,,
Can anybody give me a brief idea what is following bold letter statement is for!!
what is the term called so that I can google for it..
It seems to be an array inside another array..
awk'
/TXADDR/ { txaddr=$NF } ##understood
/TXDATA/ { txdata]=$NF... (1 Reply)
In a single dim. awk array, we can use :
<index> in <array name>
to determine whether a particualar index exists in the array or not.
Is there a way to achieve this in a awk multi dim. array ? (4 Replies)
Hi! I need to make dynamic multidimensional arrays using the vector class. I found in this page How to dynamically create a two dimensional array? - Microsoft: Visual C++ FAQ - Tek-Tips the way to do it in 2D, and now i'm trying to expand it to 3D but i don't understand how is the operator working,... (0 Replies)
I'm currently working with dozens of FASTA files, and I'm tired of having to manually change the filename in my Perl script.
I'm trying to write a simple Perl script that'll create a 2-dimensional array containing the name of the folders and its contents.
For example, I would like the output... (6 Replies)
i have a file,like
1 3
4 5
6 7
8 9
i want to save it into an array.
and then i want to get every element, because i want to use them to calculate. for example: i want to calculate 1 + 3.
but i cannot reach my goal.
open (FILE, "<", "number");
my @arr;
while (<FILE>){
chomp;... (1 Reply)
Hi,
I was trying to process a file with the help of awk. I want to first display all the rows that contains 01 and at the end of processing I have to print some portion of all the lines. like below.
Output expected: (2 Replies)
#!/usr/local/bin/perl
use DBI;
use File::Copy;
use Time::Local;
use Data::Dumper;
-Comments Describing what I'm doing--------------
-I'm pulling information from a database that has an ID and Name. They are separated by a space and I'm trying to load them into a multidimensional array so as... (3 Replies)
I am learning about bash system variables, such as $ , @ and #.
I have this piece of script implementing an array and it is doing its job just fine.
This is not the only array I will be using.
Just for ease of maintenance and more coding I would like to have the arrays in two dimensional... (4 Replies)
Hello
I have a problem.
I create a Multidimensional Array Like this:
ENTRY="$kunnum-$host"
ENTRY="$host"
ENTRY="# $3"
for key in "${!ENTRY}"; do
ENTRIES=${ENTRY} # INDEX=IP(5)
donedeclare -p
declare -A ENTRIES=(="unas15533" ="unas" ="# RDP-Terminal 2"... (12 Replies)
Discussion started by: Marti95
12 Replies
LEARN ABOUT DEBIAN
shell-quote
SHELL-QUOTE(1p) User Contributed Perl Documentation SHELL-QUOTE(1p)NAME
shell-quote - quote arguments for safe use, unmodified in a shell command
SYNOPSIS
shell-quote [switch]... arg...
DESCRIPTION
shell-quote lets you pass arbitrary strings through the shell so that they won't be changed by the shell. This lets you process commands
or files with embedded white space or shell globbing characters safely. Here are a few examples.
EXAMPLES
ssh preserving args
When running a remote command with ssh, ssh doesn't preserve the separate arguments it receives. It just joins them with spaces and
passes them to "$SHELL -c". This doesn't work as intended:
ssh host touch 'hi there' # fails
It creates 2 files, hi and there. Instead, do this:
cmd=`shell-quote touch 'hi there'`
ssh host "$cmd"
This gives you just 1 file, hi there.
process find output
It's not ordinarily possible to process an arbitrary list of files output by find with a shell script. Anything you put in $IFS to
split up the output could legitimately be in a file's name. Here's how you can do it using shell-quote:
eval set -- `find -type f -print0 | xargs -0 shell-quote --`
debug shell scripts
shell-quote is better than echo for debugging shell scripts.
debug() {
[ -z "$debug" ] || shell-quote "debug:" "$@"
}
With echo you can't tell the difference between "debug 'foo bar'" and "debug foo bar", but with shell-quote you can.
save a command for later
shell-quote can be used to build up a shell command to run later. Say you want the user to be able to give you switches for a command
you're going to run. If you don't want the switches to be re-evaluated by the shell (which is usually a good idea, else there are
things the user can't pass through), you can do something like this:
user_switches=
while [ $# != 0 ]
do
case x$1 in
x--pass-through)
[ $# -gt 1 ] || die "need an argument for $1"
user_switches="$user_switches "`shell-quote -- "$2"`
shift;;
# process other switches
esac
shift
done
# later
eval "shell-quote some-command $user_switches my args"
OPTIONS --debug
Turn debugging on.
--help
Show the usage message and die.
--version
Show the version number and exit.
AVAILABILITY
The code is licensed under the GNU GPL. Check http://www.argon.org/~roderick/ or CPAN for updated versions.
AUTHOR
Roderick Schertler <roderick@argon.org>
perl v5.8.4 2005-05-03 SHELL-QUOTE(1p)