Perl: What is -> operator stands for?

mike_bihan · Aug 27, 2008

|| operator stands for ?

There is a line in perl script:

$a{$b} -> {$c}++;

what does this line do? thanks

saeidj · Aug 28, 2008

$a{$b} -> {$c}++;

Hi
You know that:
$a is a scalar variable.
$a++ returns $a and then increments it.
The {} brackets are used to reference elements in the hash.
The -> is the infix dereference operator. It tells Perl that the thing being dereferenced on the left is connected to something on the right.

For more information, see these links:
https://www.cs.mcgill.ca/~abatko/computers/programming/perl/howto/hash/
https://www.cs.cf.ac.uk/Dave/PERL/node63.html

mike_bihan · Aug 28, 2008

A few things to confirm:

1. Does it means the $b element is a hash inside arrary a?

2. Does it incremen the element inside hash table "b" with key as " a"?

$a{$b} -> {$c} ++;
^^^^^^^^^^

3. Is $a{$b} -> {$c} ++; equivalent to

$a{$b{$c}} ++;

Thanks.

Perl: What is -> operator stands for?

mike_bihan

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saeidj

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Perl: What is -> operator stands for?

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