Discussion on: Coding Puzzles: Week of 4/8

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Monday (8KYU): How many stairs will Suzuki climb in 20 years?

def stairs_in_20(stairs):
    return 20*sum(sum(stairs, []))

Laurie • Apr 8 '19 • Edited

Javascript (ES6):

function stairs_in_20(stairs) {
       return stairs.reduce((steps, day) => steps.concat(day)).reduce((sum, count) => sum + count) * 20;
}

Jelle Bekker • Apr 8 '19

Not a one liner like you guys but C#:

using System;
public class Kata
{
  public static long StairsIn20(int[][] stairs)
  {
    long sum = 0;
    foreach (var weekday in stairs)
        foreach (var steps in weekday)
          sum += steps;

    return sum * 20;
   }           
}

Jelle Bekker • Apr 9 '19

Okay, I couldn't help myself:

using System;
using System.Linq;

public class Kata
{
  public static long StairsIn20(int[][] stairs)
  {
    return stairs.SelectMany(x => x).Sum() * 20;
  }
}

Ali Spittel • Apr 8 '19 • Edited

My Python solution:

def stairs_in_20(stairs):
      return sum(i for sublist in stairs for i in sublist)  * 20

Courtney • Apr 10 '19

Practicing TypeScript for my upcoming internship. And I figured out how to add code highlighting!

function stairsIn20(stairs : number[][]) : number {
    let totalStairs : number = 0;
    for(let day of stairs) {
      totalStairs += day.reduce((total, num) => total + num);
    }
    return totalStairs * 20;
  }