開発環境
- OS: Windows 10 Pro
- IDE(統合開発環境): Visual Studio Community 2017
Head First C# ―頭とからだで覚えるC#の基本 (Andrew Stellman (著)、Jennifer Greene (著)、佐藤 嘉一 (監修, 監修)、木下 哲也 (翻訳)、オライリージャパン)の11章(LINQ データの管理)、プールパズル(p. 485)を取り組んでみる。
コード
using System; using System.Linq; class Program { static void Main(string[] args) { Line[] lines = { new Line(new string[]{"eating", "carrots,","but", "enjoy", "Horses" }, 1), new Line(new string[]{"zebras?", "hay","Cows", "bridge.", "bolted" }, 2), new Line(new string[]{"fork", "dogs!", "Engine", "and" }, 3), new Line(new string[]{"love", "they", "apples.", "eating" }, 2), new Line(new string[]{"whistled.", "Bump" }, 1) }; var words = from line in lines group line by line.value into wordGroups orderby wordGroups.Key select wordGroups; var twoGroups = words.Take(2); foreach (var group in twoGroups) { int i = 0; foreach (Line inner in group) { i++; if (i == group.Key) { var poem = from word in inner.words orderby word descending select word + " "; foreach (var word in poem) { Console.Write(word); } } } } } } public class Line { public string[] words; public int value; public Line(string[] words, int value) { this.words = words; this.value = value; } }
入出力結果(コマンドプロンプト)
Horses enjoy eating carrots, but they love eating apples. 続行するには何かキーを押してください . . .
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