3.4.1 It Slices!
Sometimes, you may want to create a new array based on some subset of
elements from another array. To do this, you use a slice. Slices use a
subscript that is itself a list of integers to grab a list of elements
from an array. This looks easier in Perl than it does in English:
my @stuff = qw/everybody wants a rock/;
my @rock = @stuff[1 .. $#stuff]; # @rock is qw/wants a rock/
my @want = @stuff[ 0 .. 1]; # @want is qw/everybody wants/
@rock = @stuff[0, $#stuff]; # @rock is qw/everybody rock/
As you can see, you can use both the
.. operator and commas to
build a list for use as a slice subscript. This can be a very useful
feature for array manipulation.