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  1. import Control.Arrow
  2. tov = uncurry (***) . (sub *** sub) 
  3. main = print $ det ((1, 2), (3, 4))
Compilation error #stdin compilation error #stdout 0s 0KB
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stdin
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Standard input is empty
compilation info 
[1 of 1] Compiling Main             ( prog.hs, prog.o )

prog.hs:2:23: Not in scope: `sub'

prog.hs:2:31: Not in scope: `sub'

prog.hs:3:15: Not in scope: `det'
stdout
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Standard output is empty
https://ideone.com/qIMrt
language:
Haskell (ghc 8.4.4)
created:
14 years ago
visibility:
public

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