Section of an infix operator

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Revision as of 14:04, 3 July 2007 by Lemming (talk | contribs) (sectioning examples taken from article Currying)
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In Haskell there is a special syntax for partial application on infix operators.

  • (2^) is equivalent to (^) 2
  • (^2) is equivalent to flip (^) 2


Like partial application and lambda abstraction, sectioning provides a convenient way of writing some functions without having to explicitly name them:

  • (1+) (unsugared: (+) 1) is the "increment" function,
  • (2*) is the "double" function,
  • ('\t':) is the "indent" function,
  • (`elem` "AEIOU") is the "is-capital-vowel-in-English" function (ignoring the "sometimes Y").

See also