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muraiki/fib.pl6

Last active August 29, 2015 14:14
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multi+cached+subset
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fib.pl6
subset NonNegativeInt of Int where * >= 0;
proto fib (|) is cached returns NonNegativeInt {*}
multi fib (0) { 0 }
multi fib (1) { 1 }
multi fib (NonNegativeInt $n) { fib($n - 1) + fib($n - 2) }
say fib(100)
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