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How to get first element in a list of tuples?
...tually a list of sets, then there is no first element because sets have no order.
Here I've created a flat list because generally that seems more useful than creating a list of 1 element tuples. However, you can easily create a list of 1 element tuples by just replacing seq[0] with (seq[0],).
...
菜单的背景颜色 - C/C++ - 清泛网 - 专注C/C++及内核技术
...运行效果如下图：
（PS：不知道大家有没有碰到过这个问题,MENUINFO结构未定义，解决的方法是进入文件选项卡（FileView),在Source File文件下的StdAfx.cpp文件里的最前面部分添加这个语句：#define WINVER 0x0501）
设计弹出式菜单
CMen...
Turn off constraints temporarily (MS SQL)
..._SCHEMA AS TableSchema
FROM INFORMATION_SCHEMA.TABLES t
ORDER BY t.TABLE_NAME, t.TABLE_SCHEMA
OPEN triggerCursor
FETCH NEXT FROM triggerCursor INTO @tableName, @tableSchema
WHILE ( @@FETCH_STATUS = 0 )
BEGIN
SET @sql = 'ALTER TABLE ' + @tableSchema + '...
Find intersection of two nested lists?
...
Plus, using set will lead to code that's orders of magnitude faster. Here's a sample benchmark®: gist.github.com/andersonvom/4d7e551b4c0418de3160
– andersonvom
Nov 25 '15 at 15:33
...
What is Lazy Loading?
...ects unnecessarily. For instance if you have a "Customer" class which has "Orders" object aggregated. So you like to load the customer data but the orders objects you would like to delay until your application needs it.
Below is a youtube video which demonstrates how to use lazy loading , how we ...
Real life example, when to use OUTER / CROSS APPLY in SQL
... WHERE pa.object_id = pr.object_id
ORDER BY pr.name) pa
ORDER BY pr.name,
pa.name
2) Calling a Table Valued Function for each row in the outer query
SELECT *
FROM sys.dm_exec_query_stats AS qs
CROSS APPLY sys.dm_exec_query_plan(qs.plan_handle)
...
What is the difference between Scope_Identity(), Identity(), @@Identity, and Ident_Current()?
...l, session is unique for your script-run after connect(). When pooling ... PHP for SQL Server uses ODBC connection pooling. When a connection from the pool is used, the connection state is reset. Closing the connection returns the connection to the pool. (note: see remarks for linux/mac) docs.micros...
SVN encrypted password store
... You can get it without recompiling, based on ubuntuforums.org/showthread.php?t=1348567. Just set this to ~/.subversion/config [auth] password-stores = gnome-keyring
– fikr4n
Apr 29 '12 at 3:21
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What exactly does git's “rebase --preserve-merges” do (and why?)
...ve rebase".)
But here I will sketch what I think is the essence of it. In order to reduce the number of things to think about, I have taken a few liberties. (e.g. I don't try to capture with 100% accuracy the precise order in which computations take place, and ignore some less central-seeming topic...
What are inline namespaces for?
...de namespace Mine, but I don't have to entirely understand the use-case in order to take Bjarne's word for it on the committee's motivation.
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