2016 Update

Task/Fibonacci-sequence/Perl-6/fibonacci-sequence-1.pl6

@@ -1 +1 @@
-my constant @fib = 0, 1, *+* ... *;
+constant @fib = 0, 1, *+* ... *;

Task/Fibonacci-sequence/Perl-6/fibonacci-sequence-3.pl6

@@ -1,2 +1,2 @@
-my constant @neg_fib = 0, 1, *-* ... *;
-sub fib ($n) { $n >= 0 and @fib[$n] or @neg_fib[-$n]; }
+constant @neg-fib = 0, 1, *-* ... *;
+sub fib ($n) { $n >= 0 ?? @fib[$n] !! @neg-fib[-$n] }

Task/Fibonacci-sequence/Perl-6/fibonacci-sequence-5.pl6

@@ -1,3 +1,4 @@
+use experimental :cached;
 proto fib (Int $n --> Int) is cached {*}
 multi fib (0)  { 0 }
 multi fib (1)  { 1 }