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aaelvs.alicato

FizzBuzz

Fundamentals
Strings
Data Types
Logic
Code
Diff
  • public class FizzBuzz
{
    public string GetOutput(int number) =>
        (number % 3, number % 5) switch
        {
            (0, 0) => "FizzBuzz",
            (0, _) => "Fizz",
            (_, 0) => "Buzz",
            (_, _) => $"{number}"
        };
}
    • public class FizzBuzz
    • {
    • public string GetOutput(int number)
    • {
    • var ret = string.Empty;
    • if (number % 3 == 0)
    • ret += "Fizz";
    • if (number % 5 == 0)
    • ret += "Buzz";
    • if (ret.Length == 0)
    • ret = number.ToString();
    • return ret;
    • }
    • {
    • public string GetOutput(int number) =>
    • (number % 3, number % 5) switch
    • {
    • (0, 0) => "FizzBuzz",
    • (0, _) => "Fizz",
    • (_, 0) => "Buzz",
    • (_, _) => $"{number}"
    • };
    • }
aaelvs.MMMelnyk

Adding the digits of an integer

We can use recursion because the size of long is limited
Also we could combine two methods like this:

f(x) => x == 0 ? 0 : x < 0 ? f(-x) : x % 10 + f(x / 10);

or even multiply by the signum of x on each iteration:

(x >> sizeof(long) * 8 - 1 << 1) + 1

but it is a bit slower.

Code
Diff
  • using System;
using System.Linq;
using System.Collections.Generic;

namespace Kumite
{
    public class Problem
    {
        public static long SignedSumDigitsOf(long x) =>
          x == 0 ? 0 : x % 10 + SignedSumDigitsOf(x / 10);

        public static long SumDigitsOf(long x) =>
          SignedSumDigitsOf(x) * Math.Sign(x);
    }
}
    • using System;
    • using System.Linq;
    • using System.Collections.Generic;
    • namespace Kumite
    • {
    • public class Problem
    • {
    • public static int SumDigitsOf(long integer) =>
    • Array.ConvertAll(integer.ToString().TrimStart('-').ToCharArray(),
    • c => (int)Char.GetNumericValue(c)).Sum();
    • }
    • public class Problem
    • {
    • public static long SignedSumDigitsOf(long x) =>
    • x == 0 ? 0 : x % 10 + SignedSumDigitsOf(x / 10);
    • public static long SumDigitsOf(long x) =>
    • SignedSumDigitsOf(x) * Math.Sign(x);
    • }
    • }
aaelvs.Nimrod Bagdadi

Is Isogram?

Code
Diff
  • using System.Linq;
using System.Collections.Generic;

public class Kata
{
    public static bool IsIsogram(string str, HashSet<int> hs = null) =>
        str.All(c => (hs ??= new HashSet<int>()).Add(c & 0x1f));
}
    • using System.Linq;
    • using System.Collections.Generic;
    • public class Kata
    • {
    • public static bool IsIsogram(string str) => str.Length == str.ToLower().Distinct().Count();
    • public static bool IsIsogram(string str, HashSet<int> hs = null) =>
    • str.All(c => (hs ??= new HashSet<int>()).Add(c & 0x1f));
    • }