4-15 orderBy排序

华神说编程 2024-08-24 14:22:13

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4-15 orderBy排序	4-15 orderBy排序 4-15 orderBy排序

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orderBy和sort：按指定字段排序，默认为升序，例如，按照时间字段进行排序: df.orderBy("visittime").show(false) 输出： +---+----+----+---------------------+ |id |user|type|visittime | +---+----+----+---------------------+ |12 |1 |助手2 |2017-07-07 13:45:08.0| |10 |2 |助手1 |201

strs.OrderBy(n=>n) 得出的结论是 1， 11,111,2，22,222。想要得出 1,2,11,22,111,222 咋办？

在项目中，遇到一个问题，Angular中的ng-repeat中，track by和order by同时使用时候，order by失效了。我们先来看一下ng-repeat的工作原理。这里有一个Demo: 1.原始状态 index.html Insert title here</a></div><div data-report-view="{"mod":"popu_645","index":"4","dest":"https://blog.csdn.net/weixin_34268169/article/details/86219922","strategy":"2~default~ElasticSearch~Rate","extra":"{\"utm_medium\":\"distribute.pc_relevant_bbs_down_v2.none-task-blog-2~default~ElasticSearch~Rate-4-86219922-bbs-619273316.264^v3^pc_relevant_bbs_down_v2_default\",\"dist_request_id\":\"silkroad_1791828756142\"}","spm":"1035.2023.3001.6557"}" class="list-item" data-v-ca2d15ac><div class="recommend-title" data-v-ca2d15ac><img 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data-report-click="{"mod":"popu_645","index":"4","dest":"https://blog.csdn.net/weixin_34268169/article/details/86219922","strategy":"2~default~ElasticSearch~Rate","extra":"{\"utm_medium\":\"distribute.pc_relevant_bbs_down_v2.none-task-blog-2~default~ElasticSearch~Rate-4-86219922-bbs-619273316.264^v3^pc_relevant_bbs_down_v2_default\",\"dist_request_id\":\"silkroad_1791828756142\"}","spm":"1035.2023.3001.6557"}" data-report-query="spm=1035.2023.3001.6557&utm_medium=distribute.pc_relevant_bbs_down_v2.none-task-blog-2~default~ElasticSearch~Rate-4-86219922-bbs-619273316.264^v3^pc_relevant_bbs_down_v2_default&depth_1-utm_source=distribute.pc_relevant_bbs_down_v2.none-task-blog-2~default~ElasticSearch~Rate-4-86219922-bbs-619273316.264^v3^pc_relevant_bbs_down_v2_default" class="title" data-v-ca2d15ac>linq之<em>order</em>by子句</a></div> <a target="_blank" href="https://blog.csdn.net/weixin_34268169/article/details/86219922" data-report-click="{"mod":"popu_645","index":"4","dest":"https://blog.csdn.net/weixin_34268169/article/details/86219922","strategy":"2~default~ElasticSearch~Rate","extra":"{\"utm_medium\":\"distribute.pc_relevant_bbs_down_v2.none-task-blog-2~default~ElasticSearch~Rate-4-86219922-bbs-619273316.264^v3^pc_relevant_bbs_down_v2_default\",\"dist_request_id\":\"silkroad_1791828756142\"}","spm":"1035.2023.3001.6557"}" data-report-query="spm=1035.2023.3001.6557&utm_medium=distribute.pc_relevant_bbs_down_v2.none-task-blog-2~default~ElasticSearch~Rate-4-86219922-bbs-619273316.264^v3^pc_relevant_bbs_down_v2_default&depth_1-utm_source=distribute.pc_relevant_bbs_down_v2.none-task-blog-2~default~ElasticSearch~Rate-4-86219922-bbs-619273316.264^v3^pc_relevant_bbs_down_v2_default" class="desc" data-v-ca2d15ac>　　在Linq查询中，<em>order</em>by 子句可以对查询结果集进行<em>排序</em>，可以升序也可以降序，<em>排序</em>关键字可以是多个。默认<em>排序</em>方式为升序。下面的实例代码<em>Order</em>Query()中演示了<em>order</em>by子句对查询的结果进行倒序<em>排序</em>的方法。 1、创建数据类型为List<UserBaseInfo>的数据源users。 2、使用where筛选出id值小于6的元素。 3、使用<em>order</em>by对结果...</a></div><div data-report-view="{"mod":"popu_645","index":"5","dest":"https://blog.csdn.net/grape_yan/article/details/135323116","strategy":"2~default~ElasticSearch~Rate","extra":"{\"utm_medium\":\"distribute.pc_relevant_bbs_down_v2.none-task-blog-2~default~ElasticSearch~Rate-5-135323116-bbs-619273316.264^v3^pc_relevant_bbs_down_v2_default\",\"dist_request_id\":\"silkroad_1791828756142\"}","spm":"1035.2023.3001.6557"}" class="list-item" data-v-ca2d15ac><div class="recommend-title" data-v-ca2d15ac><img 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data-report-click="{"mod":"popu_645","index":"5","dest":"https://blog.csdn.net/grape_yan/article/details/135323116","strategy":"2~default~ElasticSearch~Rate","extra":"{\"utm_medium\":\"distribute.pc_relevant_bbs_down_v2.none-task-blog-2~default~ElasticSearch~Rate-5-135323116-bbs-619273316.264^v3^pc_relevant_bbs_down_v2_default\",\"dist_request_id\":\"silkroad_1791828756142\"}","spm":"1035.2023.3001.6557"}" data-report-query="spm=1035.2023.3001.6557&utm_medium=distribute.pc_relevant_bbs_down_v2.none-task-blog-2~default~ElasticSearch~Rate-5-135323116-bbs-619273316.264^v3^pc_relevant_bbs_down_v2_default&depth_1-utm_source=distribute.pc_relevant_bbs_down_v2.none-task-blog-2~default~ElasticSearch~Rate-5-135323116-bbs-619273316.264^v3^pc_relevant_bbs_down_v2_default" class="title" data-v-ca2d15ac>【C# 技术】 C# 常用<em>排序</em>方式——自定义数据<em>排序</em></a></div> <a target="_blank" href="https://blog.csdn.net/grape_yan/article/details/135323116" data-report-click="{"mod":"popu_645","index":"5","dest":"https://blog.csdn.net/grape_yan/article/details/135323116","strategy":"2~default~ElasticSearch~Rate","extra":"{\"utm_medium\":\"distribute.pc_relevant_bbs_down_v2.none-task-blog-2~default~ElasticSearch~Rate-5-135323116-bbs-619273316.264^v3^pc_relevant_bbs_down_v2_default\",\"dist_request_id\":\"silkroad_1791828756142\"}","spm":"1035.2023.3001.6557"}" data-report-query="spm=1035.2023.3001.6557&utm_medium=distribute.pc_relevant_bbs_down_v2.none-task-blog-2~default~ElasticSearch~Rate-5-135323116-bbs-619273316.264^v3^pc_relevant_bbs_down_v2_default&depth_1-utm_source=distribute.pc_relevant_bbs_down_v2.none-task-blog-2~default~ElasticSearch~Rate-5-135323116-bbs-619273316.264^v3^pc_relevant_bbs_down_v2_default" class="desc" data-v-ca2d15ac>在最近的项目中经常会对C#中的数据进行<em>排序</em>，对于基本数据类型，其<em>排序</em>方式比较简单，只需要调用内置算法即可实现，但对于自定义数据类型以及自定义<em>排序</em>规则的情况实现起来就比较麻烦，所以在本文章中将详细介绍一下在中C#中如何对数据进行<em>排序</em>。</a></div></div></div></div> <div 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