Data.Tuple.Utils

This module provides various helpful utilities for dealing with tuples.

Written by Neil Mitchell, http://www.cs.york.ac.uk/~ndm/

Construction

dup :: a -> (a, a)

Construct a pair by duplication of a single value

Since: 1.4.3.0

triple :: a -> (a, a, a)

Construct a 3-tuple from a single value

Since: 1.4.3.0

Extraction

fst3 :: (a, b, c) -> a

Take the first item out of a 3 element tuple

snd3 :: (a, b, c) -> b

Take the second item out of a 3 element tuple

thd3 :: (a, b, c) -> c

Take the third item out of a 3 element tuple