23 Nov
2019
23 Nov
'19
2:05 p.m.
Hello Alexander, On Sat, Nov 23, 2019 at 07:38:03PM +0100, Alexander Chen wrote:
Hi,
I am doing some further learning with euler now in Haskell instead of Julia. But I am getting something strange.
[x+y+z | x <- a2, y <- b3, z <- c4, (x+y+z) < 50]
a2, b3, c4 are all finite lists derived from the lazy list of the primes package. the output is:
[28,47,33,49
λ> :m Data.Numbers.Primes λ> let a = take 100 primes λ> length [x+y+x | x <- a, y <- a, z <- a, (x+y+z) < 50] 942 I suspect one in [a2, b3, c4] is infinite (or very very long). Can you paste the whole calculation? -F