Added "repeated combination" example

Author: occar421

Misc/RepeatedCombination/Properties/launchSettings.json

@@ -0,0 +1,8 @@
+{
+ "profiles": {
+ "RepeatedCombination": {
+ "commandName": "Project",
+ "commandLineArgs": "> result.txt"
+ }
+ }
+}

Misc/RepeatedCombination/RepeatedCombination.cs

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+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Threading.Tasks;
+
+namespace RepeatedCombination
+{
+public class RepeatedCombination
+{
+public static void Main(string[] args)
+{
+foreach (var n in Generate(new[] { 0, 1, 2 }, 3))
+{
+Console.WriteLine(string.Concat(n));
+}
+}
+
+static IEnumerable<IEnumerable<T>> Generate<T>(IEnumerable<T> elements, int n) => Generate<T>(elements, n, Enumerable.Empty<T>());
+
+static IEnumerable<IEnumerable<T>> Generate<T>(IEnumerable<T> elements, int n, IEnumerable<T> elementBase)
+{
+if (elementBase.Count() >= n)
+{
+yield return elementBase;
+yield break;
+}
+
+foreach (var e in elements)
+{
+foreach (var item in Generate(elements, n, new List<T>(elementBase) { e }))
+{
+yield return item;
+}
+}
+}
+}
+}

Misc/RepeatedCombination/RepeatedCombination.sln

@@ -0,0 +1,22 @@
+
+Microsoft Visual Studio Solution File, Format Version 12.00
+# Visual Studio 14
+VisualStudioVersion = 14.0.25420.1
+MinimumVisualStudioVersion = 10.0.40219.1
+Project("{8BB2217D-0F2D-49D1-97BC-3654ED321F3B}") = "RepeatedCombination", "RepeatedCombination.xproj", "{078A8721-7C71-4C1C-9A45-7E99CC12147C}"
+EndProject
+Global
+GlobalSection(SolutionConfigurationPlatforms) = preSolution
+Debug|Any CPU = Debug|Any CPU
+Release|Any CPU = Release|Any CPU
+EndGlobalSection
+GlobalSection(ProjectConfigurationPlatforms) = postSolution
+{078A8721-7C71-4C1C-9A45-7E99CC12147C}.Debug|Any CPU.ActiveCfg = Debug|Any CPU
+{078A8721-7C71-4C1C-9A45-7E99CC12147C}.Debug|Any CPU.Build.0 = Debug|Any CPU
+{078A8721-7C71-4C1C-9A45-7E99CC12147C}.Release|Any CPU.ActiveCfg = Release|Any CPU
+{078A8721-7C71-4C1C-9A45-7E99CC12147C}.Release|Any CPU.Build.0 = Release|Any CPU
+EndGlobalSection
+GlobalSection(SolutionProperties) = preSolution
+HideSolutionNode = FALSE
+EndGlobalSection
+EndGlobal

Misc/RepeatedCombination/RepeatedCombination.xproj

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+<?xml version="1.0" encoding="utf-8"?>
+<Project ToolsVersion="14.0" DefaultTargets="Build" xmlns="http://schemas.microsoft.com/developer/msbuild/2003">
+ <PropertyGroup>
+ <VisualStudioVersion Condition="'$(VisualStudioVersion)' == ''">14.0</VisualStudioVersion>
+ <VSToolsPath Condition="'$(VSToolsPath)' == ''">$(MSBuildExtensionsPath32)\Microsoft\VisualStudio\v$(VisualStudioVersion)</VSToolsPath>
+ </PropertyGroup>
+
+ <Import Project="$(VSToolsPath)\DotNet\Microsoft.DotNet.Props" Condition="'$(VSToolsPath)' != ''" />
+ <PropertyGroup Label="Globals">
+ <ProjectGuid>078a8721-7c71-4c1c-9a45-7e99cc12147c</ProjectGuid>
+ <RootNamespace>RepeatedCombination</RootNamespace>
+ <BaseIntermediateOutputPath Condition="'$(BaseIntermediateOutputPath)'=='' ">.\obj</BaseIntermediateOutputPath>
+ <OutputPath Condition="'$(OutputPath)'=='' ">.\bin\</OutputPath>
+ <TargetFrameworkVersion>v4.5.2</TargetFrameworkVersion>
+ </PropertyGroup>
+
+ <PropertyGroup>
+ <SchemaVersion>2.0</SchemaVersion>
+ </PropertyGroup>
+ <Import Project="$(VSToolsPath)\DotNet\Microsoft.DotNet.targets" Condition="'$(VSToolsPath)' != ''" />
+</Project>

Misc/RepeatedCombination/project.json

@@ -0,0 +1,19 @@
+{
+ "version": "1.0.0-*",
+ "buildOptions": {
+ "emitEntryPoint": true
+ },
+
+ "dependencies": {
+ "Microsoft.NETCore.App": {
+ "type": "platform",
+ "version": "1.0.1"
+ }
+ },
+
+ "frameworks": {
+ "netcoreapp1.0": {
+ "imports": "dnxcore50"
+ }
+ }
+}

Misc/RepeatedCombination/result.txt

@@ -0,0 +1,27 @@
+000
+001
+002
+010
+011
+012
+020
+021
+022
+100
+101
+102
+110
+111
+112
+120
+121
+122
+200
+201
+202
+210
+211
+212
+220
+221
+222