my @suits  = < ♣ ♢ ♡ ♠ >;
my @ranks  = 2..10, < J Q K A >;

# concatenate each rank with each suit (2♣ 2♢ 2♡ ... A♠)
my @deck = @ranks X~ @suits;

The X~ operator combines each rank with each suit to produce 52 strings:

["2♣", "2♢", "2♡", "2♠", "3♣", "3♢", ..., "A♡", "A♠"]