How to resolve the algorithm Top rank per group step by step in the F# programming language

Published on 12 May 2024 09:40 PM
#F_Sharp

How to resolve the algorithm Top rank per group step by step in the F# programming language

Table of Contents

Problem Statement

Find the top   N   salaries in each department,   where   N   is provided as a parameter. Use this data as a formatted internal data structure (adapt it to your language-native idioms, rather than parse at runtime), or identify your external data source:

Let's start with the solution:

Step by Step solution about How to resolve the algorithm Top rank per group step by step in the F# programming language

Source code in the fsharp programming language

let data =
  [
    "Tyler Bennett",   "E10297",  32000,  "D101";   
    "John Rappl",      "E21437",  47000,  "D050";   
    "George Woltman",  "E00127",  53500,  "D101";   
    "Adam Smith",      "E63535",  18000,  "D202";   
    "Claire Buckman",  "E39876",  27800,  "D202";   
    "David McClellan", "E04242",  41500,  "D101";   
    "Rich Holcomb",    "E01234",  49500,  "D202";   
    "Nathan Adams",    "E41298",  21900,  "D050";   
    "Richard Potter",  "E43128",  15900,  "D101";   
    "David Motsinger", "E27002",  19250,  "D202";   
    "Tim Sampair",     "E03033",  27000,  "D101";   
    "Kim Arlich",      "E10001",  57000,  "D190";   
    "Timothy Grove",   "E16398",  29900,  "D190";   
  ]

let topRank n =
  Seq.groupBy (fun (_, _, _, d) -> d) data
  |> Seq.map (snd >> Seq.sortBy (fun (_, _, s, _) -> -s) >> Seq.take n)

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