Direct Reference Techniques : Reference « Data Type « Perl






  1. Perl
  2. Data Type
  3. Reference

Direct Reference Techniques

   


#!/usr/local/bin/perl
$var = "AnyThing";
#Save address of scalar variable $var
$ref = \$var;

#Dereference $ref printing value of $var
print "Value = $$ref\n";

#Save address of scalar $ref, itself a reference
$doubleRef = \$ref;

#Dereference $doubleRef, then dereference contained reference
print "Double Reference Value = $$$doubleRef\n";

#Save address of scalar $doubleRef, itself a reference
$tripleRef = \$doubleRef;

#Dereference $tripleRef, then dereference contained references
print "Triple Reference Value = $$$$tripleRef\n";








Related examples in the same category

1.Perl 5 Dereferencing Operators
2.Perl 5 Reference Assignments
3.Reference is a scalar variable
4.Increments Reference
5.Nested reference
6.References to references
7.References, Pointers
8.Creating and Dereferencing Pointers
9.Creating and dereferencing a reference
10.Creating reference for arrays
11.Demonstrates the reference syntax
12.Dereference pointer
13.Dereferencing a Reference
14.Dereferencing the Pointer
15.Direct Scalar References
16.Exchange reference
17.Get a reference to a file handle by using '$ioreference = *name{IO};'
18.Get reference of a range
19.Get the reference of the return value from substr
20.Get the reference to a scalar by using the form '$scalarreference = *name{SCALAR};'
21.Get the reference to a subroutine by using the form '$codereference = *name{CODE};'
22.Get the value from a reference
23.A reference is a scalar variable pointing-or refering to-something else
24.Reference Modification
25.Using $$ to get the value of the reference