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领域驱动设计系列(五):事件驱动之异步事件 - 更多技术 - 清泛网 - 专注C/...

... var handlers = _eventHandlerFactory.GetHandlers<T>(); handlers.Select(h => Task.Factory.StartNew(() => HandleEvent<T>(h, @event))); } 这段代码执行完,尽然发现Handler没有执行,好吧,原因是IQueryable的延迟执行,所以我们需要调用一下ToL...
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Linq 多字段排序,二次排序 - 更多技术 - 清泛网 - 专注C/C++及内核技术

...ed = source.OrderByDescending( t => t.f1 ).ThenBy( t => t.f2 );类似SQL:select * from t1 order by f1 d...Linq:ordered = source.OrderByDescending( t => t.f1 ).ThenBy( t => t.f2 ); 类似SQL:select * from t1 order by f1 desc ,f2 asc 这种写法里 OrderBy、ThenBy 是升序的,OrderByD...
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C#泛型(List)中基类和子类 怎么转换? - 更多技术 - 清泛网 - 专注C/C++及内核技术

...函数Foo,Foo支持所有子类列表。 方法一: Foo(childList.Select(p => p as BaseClass).ToList()) 上述 Select 转换是双向的,基类转子类也没问题。 方法二: List<BaseClass> baseList = new List<BaseClass>(); baseList.AddRange(childList); Foo(baseList); ...
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C#泛型(List)中基类和子类 怎么转换? - .NET(C#) - 清泛IT论坛,有思想、有深度

...函数Foo,Foo支持所有子类列表。 方法一: Foo(childList.Select(p =&gt; p as BaseClass).ToList()) 上述 Select 转换是双向的,基类转子类也没问题。 方法二: List&lt;BaseClass&gt; baseList = new List&lt;BaseClass&gt;(); baseList.AddRange(childList); Foo(b...
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App Inventor 2 如何连接MySQL数据库(阿里云数据库) · App Inventor 2 中文网

...接信息 测试代码 注意事项: 返回 HTTP 代码 200 表示SELECT 查询成功 返回 HTTP 代码 201 表示不是有效的 SELECT 查询 返回 HTTP 代码 400,表示 SQL 查询错误 请注意SQL注入风险,加强php代码的检查逻辑 前端代码块 执行sql语...
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Flatten List in LINQ

... Try SelectMany() var result = iList.SelectMany( i =&gt; i ); share | improve this answer | follow ...
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How to add spacing between UITableViewCell

... @Husam Your solution worked for me. But I have a problem when selected cell. I have set the border for contentView and whenever I selected cell the border will be smaller. How can I fix it? – Bad_Developer Mar 24 '17 at 11:09 ...
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How to replace a single word under cursor?

...22.333)? It looks like vim interprets / and . as end of the word and won't select the entire string. – Alexander Cska May 1 at 21:47 ...
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string.ToLower() and string.ToLowerInvariant()

... cultures. A Frenchman does not write SÉLECTIONNEZ x DE books instead of SELECT X FROM books. However, in order for the above code to work, a Turkish person would need to write SELECT x FROM books WHERE Author LİKE '%Adams%' (note the dot above the capital i, almost impossible to see). This wou...
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Convert array of integers to comma-separated string

...= new int[5] {1,2,3,4,5}; You can use Linq for it String arrTostr = arr.Select(a =&gt; a.ToString()).Aggregate((i, j) =&gt; i + "," + j); share | improve this answer | fo...