回答編集履歴
2
見直しキャンペーン中
test
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@@ -1,5 +1,5 @@
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大げさすぎる気がしますが、本体部分はすっきりしていますよね？ｗ
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L
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LINQを駆使すれば拡張メソッド部分なしで何とかなるとは思いますが、私は苦手なのでわかりません^^;
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```cs
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using System;
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1
見直しキャンペーン中
test
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@@ -1,101 +1,51 @@
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大げさすぎる気がしますが、本体部分はすっきりしていますよね？ｗ
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-
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Linqを駆使すれば拡張メソッド部分なしで何とかなるとは思いますが、私は苦手なのでわかりません^^;
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5
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-
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-
```
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```cs
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using System;
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using System.Collections.Generic;
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using System.Linq;
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-
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using System.Xml.Linq;
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-
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namespace Questions233905
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{
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class Program
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{
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static void Main()
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{
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var xdoc = XDocument.Load(@"ballsports.xml");
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var MaxMembers = xdoc.Root.Elements().MaxBy(x => int.Parse(x.Element("teammembers").Value));
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MaxMembers.ToList().ForEach(x => Console.WriteLine("{0} {1}", x.Element("name").Value, x.Element("teammembers").Value));
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}
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}
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-
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// https://qiita.com/Zuishin/items/95e171eccc128bdd6429
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static class IEnumerableExtensions
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{
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//public static IEnumerable<T> MinBy<T, U>(this IEnumerable<T> source, Func<T, U> selector)
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// => SelectBy(source, selector, (a, b) => Comparer<U>.Default.Compare(a, b) < 0);
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public static IEnumerable<T> MaxBy<T, U>(this IEnumerable<T> source, Func<T, U> selector)
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=> SelectBy(source, selector, (a, b) => Comparer<U>.Default.Compare(a, b) > 0);
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private static IEnumerable<T> SelectBy<T, U>(IEnumerable<T> source, Func<T, U> selector, Func<U, U, bool> comparer)
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-
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{
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var list = new LinkedList<T>();
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var prevKey = default(U);
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foreach(var item in source)
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{
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var key = selector(item);
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if(list.Count == 0 || comparer(key, prevKey))
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{
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list.Clear();
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list.AddLast(item);
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prevKey = key;
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}
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else if(Comparer<U>.Default.Compare(key, prevKey) == 0)
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{
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list.AddLast(item);
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}
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90
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-
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}
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92
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-
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return list;
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94
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-
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}
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96
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-
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}
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98
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-
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99
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}
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100
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-
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101
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```
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