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{-# LANGUAGE CPP #-}
module Main where
import Data.List
import Control.Exception
-- This module briefly tests all the functions in PrelList and a few
-- from List.
-- ToDo: test strictness properties.
main = do
-- head
print (head [1,2,3,4], head "a")
catch (print (head [] :: String)) (\(ErrorCall _) -> putStr "head []\n")
-- tail
print (tail [1,2,3,4], tail "a")
catch (print (tail [] :: String)) (\(ErrorCall _) -> putStr "tail []\n")
-- init
print (init [1,2,3,4], init "a")
catch (print (init [] :: String)) (\(ErrorCall _) -> putStr "init []\n")
-- last
print (last [1,2,3,4], last "a")
catch (print (last [] :: String)) (\(ErrorCall _) -> putStr "last []\n")
-- null
print [null [], null "abc"]
-- length
print (length [1..10])
-- foldl
print (foldl (+) 1 [1..10])
-- foldl1
print (foldl1 (+) [1..10])
catch (print (foldl1 (+) [] :: Int)) (\(ErrorCall _) -> putStr "foldl1 []\n")
-- scanl
print (scanl (+) 1 [1..10])
-- scanl1
print (scanl1 (+) [1..10])
print (scanl1 (+) [] :: [Int])
-- foldr1
print (foldr1 (+) [1..10])
catch (print (foldr1 (+) [] :: Int)) (\(ErrorCall _) -> putStr "foldr1 []\n")
-- scanr
print (scanr (+) 1 [1..10])
-- scanr1
print (scanr1 (+) [1..10])
print (scanr1 (+) [] :: [Int])
-- iterate
print (take 10 (cycle (take 4 (iterate (+1) 1))))
-- take
print (take 4 (repeat "x"), take 0 (repeat "x"), take 5 [1..4])
catch (print (take (-1) [1..10])) (\(ErrorCall _) -> putStr "take (-1)\n")
-- replicate
print [replicate 2 "abc", replicate 0 "abc", replicate 3 []]
-- drop
print [drop 5 [1..10], drop 0 [1..10], drop 5 [1..4]]
catch (print (drop (-1) [1..10])) (\(ErrorCall _) -> putStr "drop (-1)\n")
-- splitAt
print [splitAt 5 [1..10], splitAt 5 [1..4]]
catch (print (splitAt (-1) [1..10])) (\(ErrorCall _) -> putStr "splitAt (-1)\n")
-- scan
print (span (<5) [1..10])
-- break
print (break (<5) [1..10])
-- reverse
print [reverse [1..10], reverse []]
-- and
print [and [], and [True], and [False]]
-- or
print [or [], or [True], or [False]]
-- elem
print [elem 5 [1..10], elem 0 [1..10], elem 1 []]
-- notElem
print [notElem 5 [1..10], notElem 0 [1..10], notElem 1 []]
-- lookkup
print (lookup 4 (zip [1..10] (reverse [1..10])))
-- sum
print [sum [1..10], sum []]
-- product
print [product [1..10], product []]
-- maximum
print (maximum [1..10])
catch (print (maximum [] :: Int)) (\(ErrorCall _) -> putStr "maximum []\n")
-- minimum
print (minimum [1..10])
catch (print (minimum [] :: Int)) (\(ErrorCall _) -> putStr "minimum []\n")
-- concatMap
print (concatMap (:[]) [(1::Int)..10])
-- zip
print [zip [1] [2], zip [1] [], zip [] [2], zip [1..5] [2..6]]
-- zip3
print (zip3 [1,2] [3,4] [5,6])
-- zipWith
print [zipWith (+) [1,2] [3,4], zipWith (+) [1] [], zipWith (+) [] []]
-- unzip
print [unzip [(1,2),(3,4)], unzip []]
-- unzip3
print [unzip3 [(1,2,3),(3,4,5)], unzip3 []]
-- unlines
print (unlines (lines "a\nb\nc\n"), lines "", unlines [])
-- words
print (unwords (words "a b c d"), words "", unwords [])
-- deleteBy
print [deleteBy (==) 1 [0,1,1,2,3,4],
deleteBy (==) (error "deleteBy") []]
-- delete
print [delete 1 [0,1,1,2,3,4],
delete (error "delete") []]
-- (\\)
print [ [0,1,1,2,3,4] \\ [3,2,1],
[1,2,3,4] \\ [],
[] \\ [error "\\\\"] ]
|
