{"author_name":"baba_s","height":"190","provider_name":"Hatena Blog","published":"2016-10-21 10:00:00","blog_title":"\u30b3\u30ac\u30cd\u30d6\u30ed\u30b0","url":"https://baba-s.hatenablog.com/entry/2016/10/21/100000","blog_url":"https://baba-s.hatenablog.com/","image_url":"https://cdn-ak.f.st-hatena.com/images/fotolife/b/baba_s/20180826/20180826160156.png","width":"100%","provider_url":"https://hatena.blog","author_url":"https://blog.hatena.ne.jp/baba_s/","version":"1.0","categories":["C#","C# - \u62e1\u5f35\u30e1\u30bd\u30c3\u30c9"],"title":"\u3010C#\u3011LINQ\u306eSequenceEqual\u95a2\u6570\u306e\u5f15\u6570\u306b\u30e9\u30e0\u30c0\u5f0f\u3092\u4f7f\u3048\u308b\u3088\u3046\u306b\u3059\u308b\u62e1\u5f35\u30e1\u30bd\u30c3\u30c9","html":"<iframe src=\"https://hatenablog-parts.com/embed?url=https%3A%2F%2Fbaba-s.hatenablog.com%2Fentry%2F2016%2F10%2F21%2F100000\" title=\"\u3010C#\u3011LINQ\u306eSequenceEqual\u95a2\u6570\u306e\u5f15\u6570\u306b\u30e9\u30e0\u30c0\u5f0f\u3092\u4f7f\u3048\u308b\u3088\u3046\u306b\u3059\u308b\u62e1\u5f35\u30e1\u30bd\u30c3\u30c9 - \u30b3\u30ac\u30cd\u30d6\u30ed\u30b0\" class=\"embed-card embed-blogcard\" scrolling=\"no\" frameborder=\"0\" style=\"display: block; width: 100%; height: 190px; max-width: 500px; margin: 10px 0px;\"></iframe>","description":"\u30bd\u30fc\u30b9\u30b3\u30fc\u30c9 using System; using System.Collections.Generic; using System.Linq; public static class IEnumerableExtensions { private sealed class CommonSelector<T, TKey> : IEqualityComparer<T> { private Func<T, TKey> m_selector; public CommonSelector( Func<T, TKey> selector ) { m_selector = selector; } pub\u2026","type":"rich"}