Difference between revisions of "FP Laboratory 5"
Jump to navigation
Jump to search
| Line 20: | Line 20: | ||
*Main>countThem "hello hello hello" | *Main>countThem "hello hello hello" | ||
[('h',3),('e',3),('l',6),('o',3),(' ',2)] | [('h',3),('e',3),('l',6),('o',3),(' ',2)] | ||
| + | </syntaxhighlight> | ||
| + | * Create a function that generates all combinations of given length from the characters from given string. | ||
| + | <syntaxhighlight lang="Haskell">combinations :: Int -> String -> [String]</syntaxhighlight> | ||
| + | <syntaxhighlight lang="Haskell" class="myDark"> | ||
| + | *Main> combinations 3 "abcdef" | ||
| + | ["abc","abd","abe",...] | ||
</syntaxhighlight> | </syntaxhighlight> | ||
Revision as of 14:15, 17 September 2019
List comprehension
Using the list comprehension implement following functions:
- Create a function that generates a list of all odd numbers in given interval.
oddList :: Int -> Int -> [Int]
- Create a function that takes a string and converts all characters to upper case letters.
allToUpper :: String -> String
- Create a function that removes all upper case letters from a string.
removeAllUpper :: String -> String
- Create functions that computes union and intersection of two sets.
union :: [a] -> [a] -> [a]
intersection :: [a] -> [a] -> [a]
More complex functions
- Create a function that count the number of occurrences of all characters from a given string.
countThem :: String -> [(Char, Int)]
*Main>countThem "hello hello hello"
[('h',3),('e',3),('l',6),('o',3),(' ',2)]
- Create a function that generates all combinations of given length from the characters from given string.
combinations :: Int -> String -> [String]
*Main> combinations 3 "abcdef"
["abc","abd","abe",...]
