Lazy lists (II)

• Perl 6 lists are lazily evaluated
• As long as you don't ask for the last element, infinite lists are fine
• Use binding (:=) to assign them to variables
• my @fib := 1, 1, * + * ... *
• If I then ask for @fib[40], enough elements are generated to get to the 41st Fibonacci number
• Those generated elements are remembered
• Though in the future, if a list is not bound to a variable, earlier values may be forgotten

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