Haskell - Usage of higher-order functions (1) P93632


Statement
 

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Implement the following functions using higher-order functions (and other predefined functions) of Haskell without using recursion.

  1. Implement a function eql :: [Int] -> [Int] -> Bool that tells wether two lists of integers are equal.
  2. Implement a function prod :: [Int] -> Int that returns the product of a list of integers.
  3. Implement a function prodOfEvens :: [Int] -> Int that returns the product of all even numbers of a list of integers.
  4. Implement a function powersOf2 :: [Int] that generates the list of all the powers of 2.
  5. Implement a function scalarProduct :: [Float] -> [Float] -> Float that returns the dot product of two lists of float numbers with the same size.

Scoring

Each function scores 20 points.

Public test cases

  • Input

    eql [1,2,3] [1,2,3]
eql [1,2,3] [3,2,1]
eql [1,2,3] [1,2,3,4]
prod [2,10,5]
prodOfEvens [2,10,5]
take 5 powersOf2
scalarProduct [2.0,1.0,5.0] [3.0,2.0,2.0]

    Output

    True
False
False
100
20
[1,2,4,8,16]
18.0
    • Information
    Author
    Albert Rubio / Jordi Petit
    Language
    English
    Translator
    Jordi Petit
    Original language
    Catalan
    Other languages
    Catalan
    Official solutions
    Haskell
    User solutions
    Haskell