{"author_url":"https://blog.hatena.ne.jp/gothedistance/","description":"\u7c21\u5358\u306b\u3067\u304d\u308b\u3093\u3060\u306d... groupby\u306ex.id\u306f\u81ea\u5206\u304c\u96c6\u8a08\u3057\u305f\u3044key\u306e\u30aa\u30d6\u30b8\u30a7\u30af\u30c8\u3092\u6307\u305b\u3070OK\u3002 List<Foo> duplicates = sample_list.GroupBy(x => x.id) .Where(g => g.Count() > 1) .Select(g => g.FirstOrDefault()).ToList();","html":"<iframe src=\"https://hatenablog-parts.com/embed?url=https%3A%2F%2Faroundthedistance.hatenadiary.jp%2Fentry%2F2015%2F03%2F27%2F111144\" title=\"List\u304b\u3089\u30aa\u30d6\u30b8\u30a7\u30af\u30c8\u304c\u5165\u3063\u3066\u3044\u308b\u30ea\u30b9\u30c8\u306e\u91cd\u8907\u3092\u898b\u3064\u3051\u308bLinq - Life is Really Short, Have Your Life!!\" class=\"embed-card embed-blogcard\" scrolling=\"no\" frameborder=\"0\" style=\"display: block; width: 100%; height: 190px; max-width: 500px; margin: 10px 0px;\"></iframe>","blog_url":"https://aroundthedistance.hatenadiary.jp/","provider_name":"Hatena Blog","author_name":"gothedistance","image_url":null,"version":"1.0","height":"190","title":"List\u304b\u3089\u30aa\u30d6\u30b8\u30a7\u30af\u30c8\u304c\u5165\u3063\u3066\u3044\u308b\u30ea\u30b9\u30c8\u306e\u91cd\u8907\u3092\u898b\u3064\u3051\u308bLinq","published":"2015-03-27 11:11:44","type":"rich","url":"https://aroundthedistance.hatenadiary.jp/entry/2015/03/27/111144","categories":["C#"],"provider_url":"https://hatena.blog","blog_title":"Life is Really Short, Have Your Life!!","width":"100%"}