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Re: (tye)Re3: (Golf): Sieve of Eratosthenes

by tilly (Archbishop)
on Feb 26, 2011 at 01:23 UTC ( #890247=note: print w/ replies, xml ) Need Help??

in reply to (tye)Re3: (Golf): Sieve of Eratosthenes
in thread (Golf): Sieve of Eratosthenes

And almost a decade later I was randomly looking at this, and realized that it could be made shorter still.

sub sieve3 { grep{@_[map$a*$_,2..@_/($a=$_)]=0if$_[$_]>1}@_=0..pop }
Never give up on that last optimization!

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