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云数据及Firebase组件简介 · App Inventor 2 中文网
...据存储。
协作绘图应用程序
这是另一个示例，展示了如何使用 Firebase 将聊天与绘图程序结合起来进行协作草图：Firebase Chat with Interactive Drawing。
FirebaseDB vs TinyWebDB
如果你熟悉 App Inventor 的 TinyWebDB 组件，你会发现 FirebaseDB ...
云数据及Firebase组件简介 · App Inventor 2 中文网
...据存储。
协作绘图应用程序
这是另一个示例，展示了如何使用 Firebase 将聊天与绘图程序结合起来进行协作草图：Firebase Chat with Interactive Drawing。
FirebaseDB vs TinyWebDB
如果你熟悉 App Inventor 的 TinyWebDB 组件，你会发现 FirebaseDB ...
Hibernate: “Field 'id' doesn't have a default value”
...ns but again got same error what mistake i do i don't know......I am using mysql data base.
– Krunal Patel
Feb 10 '15 at 8:46
...
Counting DISTINCT over multiple columns
...INCT concat(DocumentId, DocumentSessionId)) FROM DocumentOutputItems;
In MySQL you can do the same thing without the concatenation step as follows:
SELECT count(DISTINCT DocumentId, DocumentSessionId) FROM DocumentOutputItems;
This feature is mentioned in the MySQL documentation:
http://dev.my...
How to drop all user tables?
...
Being new to Oracle and I'm more familiar with MySQL; reseting a DB seems difficult. IN MySQL a USER is separate to a DATABASE. DROP USER username CASCADE worked for me. But in MySQL all I would have to do is DROP DATABASE and create a new one
– gawp...
What's the Linq to SQL equivalent to TOP or LIMIT/OFFSET?
...p://blogs.msdn.com/vbteam/archive/2008/01/08/converting-sql-to-linq-part-7-union-top-subqueries-bill-horst.aspx for more detail.
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How to find the most recent file in a directory using .NET, and without looping?
...westFile(DirectoryInfo directory) {
return directory.GetFiles()
.Union(directory.GetDirectories().Select(d => GetNewestFile(d)))
.OrderByDescending(f => (f == null ? DateTime.MinValue : f.LastWriteTime))
.FirstOrDefault();
}
Just call it the fo...
How to check if a line is blank using regex
... answer missed many empty lines in my file, but this caught them all. The union of both regexes catches every case.
– elmor
Oct 5 '17 at 0:16
...
那些年 O2O创业我踩了十个坑 - 资讯 - 清泛网 - 专注C/C++及内核技术
那些年 O2O创业我踩了十个坑作为创始人如何分清你的项目要不要坚持，首先要分清你做的项目是在坚持还是维持，坚持可以有明天，而维持，等待的只有败局。12月4日，黑马营第一次课程结束，为期三天的课程对我影响最大的...