https://stackoverflow.com/questions/25091218/print-triangle-pattern-using-java
import Data.List (intercalate)
let line i = intercalate " " $ map show $ take i $ map (`mod` 2) [i..]
mapM_ putStrLn $ map line [1..4]
1
0 1
1 0 1
0 1 0 1
https://stackoverflow.com/questions/25091218/print-triangle-pattern-using-java
import Data.List (intercalate)
let line i = intercalate " " $ map show $ take i $ map (`mod` 2) [i..]
mapM_ putStrLn $ map line [1..4]
1
0 1
1 0 1
0 1 0 1