Weekly challenge mvdoyle#2

Author: dmcpeek

ChallengesWithTestsMark8.Tests/bin/Debug/net6.0/ChallengesWithTestsMark8.dll

@@ -1,8 +1,3 @@
-C:\Users\dmcpe\Desktop\Repos\WeeklyChallenges\ChallengesWithTestsMark8.Tests\obj\Debug\net6.0\ChallengesWithTestsMark8.Tests.csproj.AssemblyReference.cache
-C:\Users\dmcpe\Desktop\Repos\WeeklyChallenges\ChallengesWithTestsMark8.Tests\obj\Debug\net6.0\ChallengesWithTestsMark8.Tests.GeneratedMSBuildEditorConfig.editorconfig
-C:\Users\dmcpe\Desktop\Repos\WeeklyChallenges\ChallengesWithTestsMark8.Tests\obj\Debug\net6.0\ChallengesWithTestsMark8.Tests.AssemblyInfoInputs.cache
-C:\Users\dmcpe\Desktop\Repos\WeeklyChallenges\ChallengesWithTestsMark8.Tests\obj\Debug\net6.0\ChallengesWithTestsMark8.Tests.AssemblyInfo.cs
-C:\Users\dmcpe\Desktop\Repos\WeeklyChallenges\ChallengesWithTestsMark8.Tests\obj\Debug\net6.0\ChallengesWithTestsMark8.Tests.csproj.CoreCompileInputs.cache
 C:\Users\dmcpe\Desktop\Repos\WeeklyChallenges\ChallengesWithTestsMark8.Tests\bin\Debug\net6.0\ChallengesWithTestsMark8.deps.json
 C:\Users\dmcpe\Desktop\Repos\WeeklyChallenges\ChallengesWithTestsMark8.Tests\bin\Debug\net6.0\ChallengesWithTestsMark8.runtimeconfig.json
 C:\Users\dmcpe\Desktop\Repos\WeeklyChallenges\ChallengesWithTestsMark8.Tests\bin\Debug\net6.0\ChallengesWithTestsMark8.exe
@@ -96,6 +91,11 @@ C:\Users\dmcpe\Desktop\Repos\WeeklyChallenges\ChallengesWithTestsMark8.Tests\bin
 C:\Users\dmcpe\Desktop\Repos\WeeklyChallenges\ChallengesWithTestsMark8.Tests\bin\Debug\net6.0\zh-Hant\Microsoft.VisualStudio.TestPlatform.Common.resources.dll
 C:\Users\dmcpe\Desktop\Repos\WeeklyChallenges\ChallengesWithTestsMark8.Tests\bin\Debug\net6.0\ChallengesWithTestsMark8.dll
 C:\Users\dmcpe\Desktop\Repos\WeeklyChallenges\ChallengesWithTestsMark8.Tests\bin\Debug\net6.0\ChallengesWithTestsMark8.pdb
+C:\Users\dmcpe\Desktop\Repos\WeeklyChallenges\ChallengesWithTestsMark8.Tests\obj\Debug\net6.0\ChallengesWithTestsMark8.Tests.csproj.AssemblyReference.cache
+C:\Users\dmcpe\Desktop\Repos\WeeklyChallenges\ChallengesWithTestsMark8.Tests\obj\Debug\net6.0\ChallengesWithTestsMark8.Tests.GeneratedMSBuildEditorConfig.editorconfig
+C:\Users\dmcpe\Desktop\Repos\WeeklyChallenges\ChallengesWithTestsMark8.Tests\obj\Debug\net6.0\ChallengesWithTestsMark8.Tests.AssemblyInfoInputs.cache
+C:\Users\dmcpe\Desktop\Repos\WeeklyChallenges\ChallengesWithTestsMark8.Tests\obj\Debug\net6.0\ChallengesWithTestsMark8.Tests.AssemblyInfo.cs
+C:\Users\dmcpe\Desktop\Repos\WeeklyChallenges\ChallengesWithTestsMark8.Tests\obj\Debug\net6.0\ChallengesWithTestsMark8.Tests.csproj.CoreCompileInputs.cache
 C:\Users\dmcpe\Desktop\Repos\WeeklyChallenges\ChallengesWithTestsMark8.Tests\obj\Debug\net6.0\ChallengesWithTestsMark8.Tests.csproj.CopyComplete
 C:\Users\dmcpe\Desktop\Repos\WeeklyChallenges\ChallengesWithTestsMark8.Tests\obj\Debug\net6.0\ChallengesWithTestsMark8.Tests.dll
 C:\Users\dmcpe\Desktop\Repos\WeeklyChallenges\ChallengesWithTestsMark8.Tests\obj\Debug\net6.0\refint\ChallengesWithTestsMark8.Tests.dll

ChallengesWithTestsMark8.Tests/bin/Debug/net6.0/ChallengesWithTestsMark8.pdb

@@ -1,58 +1,144 @@
 using System;
 using System.Collections.Generic;
+using System.Linq;
+using System.Reflection.Metadata.Ecma335;
 
 namespace ChallengesWithTestsMark8
 {
     public class ChallengesSet02
     {
         public bool CharacterIsALetter(char c)
         {
-            throw new NotImplementedException();
+            return (char.IsLetter(c));
+
+            //throw new NotImplementedException();
         }
 
         public bool CountOfElementsIsEven(string[] vals)
         {
-            throw new NotImplementedException();
+            return (vals.Length % 2 == 0);
+
+            //throw new NotImplementedException();
         }
 
         public bool IsNumberEven(int number)
         {
-            throw new NotImplementedException();
+            return (number % 2 == 0);
+
+            //throw new NotImplementedException();
         }
 
         public bool IsNumberOdd(int num)
         {
-            throw new NotImplementedException();
+            return (num % 2 != 0);
+            //throw new NotImplementedException();
         }
 
         public double SumOfMinAndMax(IEnumerable<double> numbers)
         {
-            throw new NotImplementedException();
+            // I had to look up a function to use with IEnumerable. I'd like to learn what this type is.
+            double min = double.MaxValue;
+            double max = double.MinValue;
+            
+            if (numbers == null || numbers.Any() == false)
+            {
+                return 0;
+            }
+            else 
+            {
+
+                foreach (var number in numbers)
+                {
+                    if (number < min)
+                    {
+                        min = number;
+                    }
+                    if (number > max)
+                    {
+                        max = number;
+                    }
+                        
+                }
+
+            }
+            return (min + max);
+            //throw new NotImplementedException();
         }
 
         public int GetLengthOfShortestString(string str1, string str2)
         {
-            throw new NotImplementedException();
+            var result = str1.Length <= str2.Length ? str1.Length : str2.Length;
+            
+            return result;
+
+            //throw new NotImplementedException();
         }
 
         public int Sum(int[] numbers)
         {
-            throw new NotImplementedException();
+            if (numbers == null)
+            { 
+                return 0; 
+            }
+
+            int sum = 0;
+           foreach (int number in numbers)
+           {
+                sum += number;
+           }
+            return sum;
+            
+            //throw new NotImplementedException();
         }
 
         public int SumEvens(int[] numbers)
         {
-            throw new NotImplementedException();
+            if (numbers == null)
+            {
+                return 0;
+            }
+
+            int sum = 0;
+            foreach (int number in numbers)
+            {
+                if(number % 2 == 0)
+                {
+                    sum += number;
+                }
+
+            }
+            return sum;
+            //throw new NotImplementedException();
         }
 
         public bool IsSumOdd(List<int> numbers)
         {
-            throw new NotImplementedException();
+            if (numbers == null)
+            { 
+                return false; 
+            }
+
+            int sum = 0;
+            foreach (int number in numbers)
+            {
+                sum += number;
+            }
+            
+            bool odd = (sum == 0 || sum % 2 == 0) ? false : true;
+            return odd;
+
+            //throw new NotImplementedException();
         }
 
         public long CountOfPositiveOddsBelowNumber(long number)
         {
-            throw new NotImplementedException();
+            long count = 0;
+            for (int i = 1; i < number; i+=2)
+            {
+                count++;
+            }
+            return count;
+            //throw new NotImplementedException();
         }
     }
 }