Sorting an Array of Values Based on an Array of Keys

Oct. 25, 2017

Introduction

One apple a day, keep doctor away. One program a day, also keep programmer awake. Today a small program keeps me awake to look into a few things, ...

I like to share my practice using C# 2000 things, item 136: Sorting an Array of Values Based on an Array of Keys.

Here is the C# code.

Read the code and enjoy the workout.

	using System;
	using System.Collections.Generic;
	using System.Linq;
	using System.Text;
	using System.Threading.Tasks;
	namespace Item136_Sort
	{
	/// <summary>
	/// C# 2000 things
	/// #136 – Sorting an Array of Values Based on an Array of Keys
	/// https://csharp.2000things.com/2010/10/31/136-sorting-an-array-of-values-based-on-an-array-of-keys/
	/// You can use the Array.Sort method to sort two arrays at the same time. The values of one array are
	/// used as the keys to determine the sort order and the values of the second array are just changed to
	/// match the sequence of the first array.
	///
	/// Array.Sort takes two arrays. The first is an array of keys, dictating how the elements will be sorted.
	/// The second will just be reordered to match the sequence of the first array.
	/// </summary>
	class Program
	{
	static void Main(string[] args)
	{
	string[] titles = {
	"Pride and Prejudice",
	"Moby-Dick",
	"A Tale of Two Cities",
	"Anna Karenina",
	"Fahrenheit 451" };
	string[] firstWords = {
	"It is a truth universally acknowledged",
	"Call me Ishmael",
	"It was the best of times",
	"All happy families are alike",
	"It was a pleasure to burn" };
	Array.Sort(titles, firstWords); // Sort by title
	}
	}
	}

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