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  1. triangulate (x:a:b:xs) = scanl ((x, a, b) n -> (x, b, n)) xs (x, a, b)
  2. main = print $ triangulate $ [1, 2, 3, 4, 5, 6, 7]
Compilation error #stdin compilation error #stdout 0s 0KB
comments (?)
stdin 
Standard input is empty
compilation info 
[1 of 1] Compiling Main             ( prog.hs, prog.o )

prog.hs:1:44: parse error on input `->'
stdout 
Standard output is empty
https://ideone.com/1SZ0d
language:
Haskell (ghc 8.4.4)
created:
14 years ago
visibility:
public

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