[ LIST ]
is basically a shortcut for
do { my @anon = ( LIST ); \@anon }
It creates an array initialized with the result of the enclosed expression (if any), and returns a reference to that array.
Pregunta
I am working on some perl code that is not mine. I ran into this line and I have no idea what it is doing:
my $sum = [];
I just don't understand what this scalar is being set to.
Solución
[ LIST ]
is basically a shortcut for
do { my @anon = ( LIST ); \@anon }
It creates an array initialized with the result of the enclosed expression (if any), and returns a reference to that array.
Otros consejos
From the documentation:
If you write just [] , you get a new, empty anonymous array. If you write just {} , you get a new, empty anonymous hash.