Friends,
I would appreciate if you can throw light more on the subteleties of the
following two questions:I have this code and comments for the ease of
understanding my questions:
#========================================================
#!/usr/bin/perl
use strict;
# IF I do not assign {}, nothing is printed
my($hash) = {};
&getArray($hash);
# IF I do not engulf array-ref within {} as @{$hash->{array}}
# an error message NOT AN ARRAY reference is generated
map {print "$_\n"} @{$hash->{array}};
sub getArray{
my($hash) = shift;
$hash->{array} = [1,2,3,4,5];
}
#========================================================
a) When a hash reference is essentially a SCALAR, why should I explicitly
denote the hash variable as
my($hash) = {};
and not simply
my($hash);
b) I thought that an array can be dereferenced simply by @$arrayRef
notation. However, in the code sample I have sent, I am forced to use
@{$arrayRef} notation. Why do I need the Chain-braces?
Please clarify,
Thanks,
Rex
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