Difference between revisions of "FP Laboratory 3"

From Marek Běhálek Wiki
Jump to navigation Jump to search
Line 26: Line 26:
 
* Create a function that returns the list without the last element.
 
* Create a function that returns the list without the last element.
 
<syntaxhighlight lang="Haskell">getInit :: [a] -> [a]</syntaxhighlight>  
 
<syntaxhighlight lang="Haskell">getInit :: [a] -> [a]</syntaxhighlight>  
* Create a function that merge two lists into one list.
 
<syntaxhighlight lang="Haskell">combine :: [a] -> [a] -> [a]</syntaxhighlight>
 
 
* Create a function that reverse a list.
 
* Create a function that reverse a list.
 
<syntaxhighlight lang="Haskell">reverse :: [a] -> [a]</syntaxhighlight>
 
<syntaxhighlight lang="Haskell">reverse :: [a] -> [a]</syntaxhighlight>

Revision as of 11:03, 17 September 2019

Usage of lists

Find out the results of the following operations:

[3,2,1] > [2,1,0]  
[3,2,1] > [2,10,100]  
[3,4,2] > [3,4]  
[3,4,2] > [2,4]  
[3,4,2] == [3,4,2]

Simple functions working with list

Implement following functions:

  • Create a function that computes length of a list.
length :: [a] -> Int
  • Create a function that sums the list of integers.
sumIt :: [Int] -> Int
  • Create a function that returns the first element in the list.
getHead :: [a] -> a
  • Create a function that returns the last element in the list.
getLast :: [a] -> a
  • Create a function that checks if an element is a member of the list.
isElement :: a -> [a] -> Bool
  • Create a function that returns the list without the first element.
getTail :: [a] -> [a]
  • Create a function that returns the list without the last element.
getInit :: [a] -> [a]
  • Create a function that reverse a list.
reverse :: [a] -> [a]
  • Create a function that merge two lists into one list.
combine :: [a] -> [a] -> [a]
  • Create a function that product scalar multiplication if two vectors.
scalar :: [Int] -> [Int] -> Int