Array & Hash Operations

Working with Arrays and Hashes

Joining Arrays

join creates a string from an array:

my @words = ("hello", "world");
say join(" ", @words);   # hello world
say join(", ", @words);  # hello, world

Splitting Strings

split creates an array from a string:

my @parts = split(",", "a,b,c");
say $parts[0];   # a
say $parts[1];   # b

Sorting and Reversing

my @nums = (3, 1, 4, 1, 5);
my @sorted = sort @nums;
my @rev = reverse @nums;

Keys and Values

Extract keys or values from a hash:

my %h = (a => 1, b => 2);
my @k = keys %h;
my @v = values %h;

Your Task

Split the string "one,two,three" by comma and print each word on its own line.