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Perl References/Dereferences

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# 1  
Old 05-21-2010
Perl References/Dereferences
Can someone explain where can we actually used

Code:
print $var->[0];

or

print $$var[0]

When does the -> becomes necessary and when its optional.
# 2  
Old 05-21-2010
both does the same operation.

while removing the arrow, you are dereferencing using dollar, so by both you get the result...

arrows becomes unnecessary, when

Code:
if the arrow ends up between "subscripty kinds of things," such as square brackets, we can also drop the arrow

from Intermediate Perl.

Read references chapter for more clarification on the same.
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