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  1. Prepare
  2. Functional Programming
  3. Introduction
  4. Filter Array
  5. Discussions

Filter Array

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149 Discussions

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  • muratkhan23
     + 0 comments

    You are expected to write a custom filter function without using built-in methods. Just return a new list with elements less than the delimiter while preserving order. Make sure your function matches the given signature for your language.

  • samcarn7866
     + 0 comments

    The generate code by HR is bad. Haskell is a functional programming language and it should be a declarative style rather than imperative.

    for example this processes whole input like a stream. Betpkr Much more elegant.

    filterIt :: [Int] -> [String] filterIt (a:xs) = map show $ filter (\x -> x < a) xs

    main = interact $ unlines . filterIt. map read. words

  • michele_cianni
     + 0 comments

    F#

    let readStringList() = 
    let rec loop acc = 
        let input = Console.ReadLine() 
        if input = null then 
            List.rev acc
        else 
            loop (input :: acc) 
    loop []

let delimiter = Console.ReadLine() |> int

readStringList() 
|> List.map int // Convert string to int
|> List.filter (fun x -> x < delimiter) // Filter the list 
|> List.iter (printfn "%d") // Print the list

  • phillipraywood
     + 0 comments

    Scala

    def checkHeadLessThanDelim(delim: Int, head: Int, result: List[Int]
                          ): List[Int] = {
    if (head < delim) {
        result :+ head
    } else {
        result
    }
}

def f(delim: Int, arr: List[Int], result: List[Int] = List(),
     headChecker: (Int, Int, List[Int]) => List[Int] = checkHeadLessThanDelim
     ): List[Int] = {
    if (arr.size > 0) {
        f(delim, arr.tail, headChecker(delim, arr.head, result))
    } else {
        result
    }
}

  • JohnSmith167
     + 0 comments

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