Pick random element

In a nutshell, picking an element from a list is implemented with a method conveniently called "pick":

say (1, 2, 3).pick;

There are various ways of doing something similar, though. Raku has actually two methods (with associated functional forms) to return random elements depending on whether you are doing selection with or without replacement.

Selection with replacement: (roll of a die)

say (1..6).roll;          # return 1 random value in the range 1 through 6
say (1..6).roll(3);       # return a list of 3 random values in the range 1 through 6
say (1..6).roll(*)[^100]; # return first 100 values from a lazy infinite list of random values in the range 1 through 6

Selection without replacement: (pick a card from a deck)

# define the deck
my @deck = <2 3 4 5 6 7 8 9 J Q K A> X~ <♠ ♣ ♥ ♦>;
say @deck.pick;    # Pick a card
say @deck.pick(5); # Draw 5
say @deck.pick(*); # Get a shuffled deck

Or you can always use the normal rand built-in to generate a subscript (which automatically truncates any fractional part):

@array[@array * rand]

However, the pick and roll methods (not to be confused with the pick-and-roll method in basketball) are more general insofar as they may be used on any enumerable type:

say Bool.pick;  # returns either True or False