List of partial functions

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Partial functions in Prelude

Functions that aren't even partial

  • error
  • undefined

List functions

  • maximum
  • minimum
  • head
  • tail
  • init
  • last
  • foldl (∞)
  • foldl' (∞)
  • foldl1
  • foldl1'
  • foldr1
  • scanl1
  • scanr1
  • cycle
  •  !!
  • length (∞)
  • sum (∞)
  • product (∞)
  • reverse (∞)
  • ... (todo)

Other

  • read
  • quot
  • rem
  • quotRem
  • div
  • mod
  • divMod
  • succ
  • pred
  • toEnum
  • (^)
  • fail
  • ... (todo)

Partial functions in other base libraries

Data.List

  • genericIndex
  • genericLength (∞)

Data.Map

  • (!)

Data.Maybe

  • fromJust

Partial functions in other Haskell Platform packages

... (todo)

NB. Functions marked with (∞) are partial because the function will not terminate if given an infinite list.