Login or Register to Ask a Question and Join Our Community

Sponsored Content
Full Discussion: perl - how can we name a variable base on value of another variable
Top Forums Shell Programming and Scripting perl - how can we name a variable base on value of another variable Post 302359526 by varontron on Tuesday 6th of October 2009 09:39:36 PM
Old 10-06-2009
you can do it with a hash ref:
Code:
my $hashref = {};
$hashref->{var1} = 'val1';
my $var1 = $hashref->{var1};
$hashref->{$var1}= 'val2';
my $var2 = $hashref->{$var1};

print "KEYS:\n";
foreach my $key (keys %$hashref)
{
	print "key=".$key."\n";
}
print "\nVALUES:\n";
print "var1=".$var1."\n";
print "var2=".$var2."\n";

this results in
Code:
KEYS:
key=var1
key=val1

VALUES:
var1=val1
var2=val2

 

10 More Discussions You Might Find Interesting

1. Shell Programming and Scripting

Passing variable to perl

I need a non-perl (bash) way to strip the path from a list of "find" results. Below is the perl version which I could use, if I could figure out how to call the script with a variable (like in sh, $1 is the variable passed in ./script variable) $file = "/path/to/file.txt"; # How do I... (2 Replies)
Discussion started by: TheCrunge
2 Replies

2. Shell Programming and Scripting

Multiple variable in a variable in Perl

Hi All, I am trying to convert the below Csh while loop into Perl while loop but the problem is that in this csh script, i have 2 variables inside a variable -> $count is a variable {SB$count} as a whole is another variable. Csh is able to assign values to such variable like the below but i do... (3 Replies)
Discussion started by: Raynon
3 Replies

3. UNIX for Dummies Questions & Answers

variable created base on other var value

hi, i'm trying to create a script in ksh that will check build logs for errors. i'm using a variable to hold the grep, somthing like: grepErr=`echo "grep -i -e ' error ' -e ' errors ' -e 'rror(s)' -e 'Unsatisfied ' -e 'Undefined symbol' -e 'No rule ' -e 'Cannot' -e 'rror:' -e 'Could not find... (2 Replies)
Discussion started by: lavinia_f
2 Replies

4. Shell Programming and Scripting

perl get variable value ???

hi i have following code my $a1 = "A" ; my $a2 = "B" ; my $a3 = "C" ; foreach my $k ( 1,2,3 ) { my $msg = ${a{$k}} # this should be at runtime i am creating variable a1 and assigning it value to msg . print "$msg\n" ; } above thing is not working !!! i want when k = 1... (4 Replies)
Discussion started by: zedex
4 Replies

5. Shell Programming and Scripting

Perl - setting a variable ?

hi there, I have a question about a snippet of code i have which runs localtime() to convert the current date/time into a mysql happy format my ($sec,$min,$hour,$mday,$mon,$year,$wday,$yday,$isdst)=localtime(time); printf "%4d-%02d-%02d ... (4 Replies)
Discussion started by: rethink
4 Replies

6. Shell Programming and Scripting

How to define a variable with variable definition is stored in a variable?

Hi all, I have a variable say var1 (output from somewhere, which I can't change)which store something like this: echo $var1 name=fred age=25 address="123 abc" password=pass1234 how can I make the variable $name, $age, $address and $password contain the info? I mean do this in a... (1 Reply)
Discussion started by: freddy1228
1 Replies

7. Shell Programming and Scripting

PERL : Use of a variable in a tr

Hi, I want to count the number of occurences of a character in a string variable ($str). The character is stored in a another variable ($sepchr). I am using tr as : $count = ($str =~ tr/$sepchr//); This did not work. I found in another thread about using eval. I used eval as : ... (13 Replies)
Discussion started by: sinpeak
13 Replies

8. Shell Programming and Scripting

[Perl] Split lines into array - variable line items - variable no of lines.

Hi, I have the following lines that I would like to see in an array for easy comparisons and printing: Example 1: field1,field2,field3,field4,field5 value1,value2,value3,value4,value5Example 2: field1,field3,field4,field2,field5,field6,field7... (7 Replies)
Discussion started by: ejdv
7 Replies

9. Shell Programming and Scripting

Perl help - how to assign output of perl to variable

Hi, guys, i have a script i inherited from a coworker but i'm not perl savy. The script works but i would like it to work better. I want to run this command ./ciscomgrtest.pl -r "show version" -h hosts.router and have the script goto each router in the hosts.router file and run the command... (2 Replies)
Discussion started by: whipuras
2 Replies

10. Shell Programming and Scripting

PERL $0 variable

In PERL , $0 variable displays program name ( if we use inside script) .likewise is there a way to display program name and it's arguments passed to script . e.g. test.pl -a1 -b3 -c4 inside test.pl , if I use $0 , it gives me test.pl ..but I am looking for command to get complete program... (1 Reply)
Discussion started by: talashil
1 Replies

LEARN ABOUT X11R4

shift

shift(1)							   User Commands							  shift(1)

NAME

       shift - shell built-in function to traverse either a shell's argument list or a list of field-separated words

SYNOPSIS

   sh
       shift [n]

   csh
       shift [variable]

   ksh
       * shift [n]

DESCRIPTION

   sh
       The positional parameters from $n+1 ... are renamed $1 ... . If n is not given, it is assumed to be 1.

   csh
       The  components of argv, or variable, if supplied, are shifted to the left, discarding the first component. It is an error for the variable
       not to be set or to have a null value.

   ksh
       The positional parameters from $n+1 $n+1 ... are renamed $1 ..., default n is 1. The parameter n can  be  any  arithmetic  expression  that
       evaluates to a non-negative number less than or equal to $#.

       On this man page, ksh(1) commands that are preceded by one or two * (asterisks) are treated specially in the following ways:

       1.  Variable assignment lists preceding the command remain in effect when the command completes.

       2.  I/O redirections are processed after variable assignments.

       3.  Errors cause a script that contains them to abort.

       4.  Words,  following a command preceded by ** that are in the format of a variable assignment, are expanded with the same rules as a vari-
	   able assignment. This means that tilde substitution is performed after the = sign and word splitting and file name generation  are  not
	   performed.

ATTRIBUTES

       See attributes(5) for descriptions of the following attributes:

       +-----------------------------+-----------------------------+
       |      ATTRIBUTE TYPE	     |	    ATTRIBUTE VALUE	   |
       +-----------------------------+-----------------------------+
       |Availability		     |SUNWcsu			   |
       +-----------------------------+-----------------------------+

SEE ALSO

       csh(1), ksh(1), sh(1), attributes(5)

SunOS 5.10							    15 Apr 1994 							  shift(1)
All times are GMT -4. The time now is 03:46 PM.
Unix & Linux Forums Content Copyright 1993-2022. All Rights Reserved.
Privacy Policy