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Query related to references in array in Perl

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# 1  
Old 09-13-2012
Query related to references in array in Perl
Hi All
I have a doubt and want to be cleared I am using
Code:
@array = (10, 20);
$rarray = \@array;
#print "$rarray\n";
#print "@$rarray\n";

 $rr=  \$array[0];
 #print $$rr;
 $rr++;
 print $$rr;

As you can see the $rr contains the reference to the first element of the array , now as the definition say array contains the continuous memory location, so when I incremented the $rr with 1 so it should now print the value for $array[1]..
Please correct me if I am wrong.

---------- Post updated at 04:52 AM ---------- Previous update was at 03:02 AM ----------

Any Idea
# 2  
Old 09-13-2012
You cannot do $rr++ in perl like the way you can in C.
Perl offers a different way of accessing the subsequent elements of an array through reference variables. If you didn't already know this, take a look at the sample below:

For e.g.,
Code:
#! /usr/bin/perl -w
use strict;

my @array = (10, 20);
my $rarray = \@array;
print "@{ $rarray }[0]\n";
print "@{ $rarray }[1]\n";

# 3  
Old 09-13-2012
Also one more question , what does this Code mean
Code:
@row = (1,2,3,4);

push(@{check}, \@row);

If I want to print the values then how can I??
Also how can get the reference value for @row
Last edited by parthmittal2007; 09-13-2012 at 12:23 PM.. Reason: Addition of data
# 4  
Old 09-13-2012
Quote:
Originally Posted by parthmittal2007
Also one more question , what does this Code mean
Code:
@row = (1,2,3,4);

push(@{check}, \@row);

push (@check, \@row) : Push the reference of @row into @check.

Quote:
If I want to print the values then how can I??
Print the values of what?

Quote:
Also how can get the reference value for @row
\@row
# 5  
Old 09-14-2012
Code:
@row = (1,2,3,4);
push(@{check}, \@row);
print ${$check[0]}[1]."\n"; #1
print $check[0][1]."\n"; #2
print $check[0]->[1]."\n"; #3

I mean to say which option (1 OR 2 OR 3) is correct??
If option 2 is correct , then why??
I am not getting it , please explain

---------- Post updated at 11:05 PM ---------- Previous update was at 01:02 PM ----------

Any idea
# 6  
Old 09-14-2012
All three options are different ways that perl offers you to access the same element. Remember, with perl, its always TMTOWTDI. You adopt the style that you're comfortable with.
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