(when true   (map odd? (list 1 2 3)))简答题

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Haskell defines several built-in, higher-order functions (HOFs). An HOF is a function that can accept another function as input or that may return another function as its result. Some important HOFs in Haskell with their signatures are:  map :: (a -> b) -> [a] -> [b]  -- takes 2 inputs, a function (a -> b) and a list [a] and delivers a list of the same size and type as that of the input function. filter :: (a -> Bool) -> [a] -> [a] -- takes a function and a list and produces another list of same type as the input of the function parameter. What does the following Haskell code snippet do or produce? map (** 2) [1,2,3,4,5]  -- ** is used for exponentiation in Haskell

Haskell defines several built-in, higher-order functions (HOFs). An HOF is a function that can accept another function as input or that may return another function as its result. Some important HOFs in Haskell with their signatures are:  map :: (a -> b) -> [a] -> [b]  -- takes 2 inputs, a function (a -> b) and a list [a] and delivers a list of the same size and type as that of the input function. filter :: (a -> Bool) -> [a] -> [a] -- takes a function and a list and produces another list of same type as the input of the function parameter. What does the following Haskell code snippet do or produce? map (** 2) [1,2,3,4,5]  -- ** is used for exponentiation in Haskell

Which of the following statements best describes a higher-order function in functional programming? Choices: A function that can only take primitive data types as input. A function that operates solely on immutable data. A function that either takes other functions as arguments or returns a function as its result. A function that executes without any side effects.

Question at position 19 Given a function foo that takes an integer as an argument and returns a function as its result, which of the following statements is TRUE about foo?The function returned by foo must return an integer as a result. foo is a higher-order function, while the function returned by foo may or may not be a higher-order functionThe function returned by foo is a higher-order function.The function returned by foo must take an integer as an argument.Clear my selection

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