lazyness

haskell.hs

-- for GHCi
let infinite_list = [1..]
let values = filter ((/= 0) . (`mod` 3)) $ filter ((/= 0) . (`mod` 2)) $ map (^2) infinite_list
take 10 values
-- Should be [1,25,49,121,169,289,361,529,625,841]

rust.rs

fn main() {
    let infinite_list = 1..;
    let values = infinite_list
        .map(|x| x*x)
        .filter(|&x| x % 2 != 0)
        .filter(|&x| x % 3 != 0)
        .take(10);
    
    for i in values {
        println!("{}", i);
    }
}