原创 SQL Server discarding SPACE during GROUP BY

SQL Server discarding SPACE during GROUP BY 問題 Looks like SQL Server (tried on 2008 R2) is doing an RTRIM on columns in

原创 Is a GUID unique 100% of the time?

Is a GUID unique 100% of the time? 回答1 While each generated GUID is not guaranteed to be unique, the total number of un

原创 What is the benefit of using "SET XACT_ABORT ON" in a stored procedure?

What is the benefit of using "SET XACT_ABORT ON" in a stored procedure? 回答1 SET XACT_ABORT ON instructs SQL Server to r

原创 How can I get bootstrap version via javascript?

How can I get bootstrap version via javascript? 回答1 The version of each of Bootstrap's jQuery plugins can be accessed v

原创 冪指函數的處理

冪指函數_百度百科 (baidu.com)   What is the value of limit x^(1/(x-1)) as x tends to 1?  

原创 Twitter Bootstrap Carousel autoplay on load

Twitter Bootstrap Carousel autoplay on load 回答1 you should do as the Twitter Bootstrap Documentation says about Carouse

原创 How do I view a single file's history in GitK?

How do I view a single file's history in GitK? 回答1 To get the file history gitk <filename> To see the blame history in

原创 線性代數 行列式的計算

主對角線(從左上角到右下角這條對角線)下方的元素全爲零的行列式稱爲上三角行列式。一個n階行列式若能通過變換,化爲上三角行列式,則計算該行列式就很容易了。 通過初等變換,把普通的行列式轉換爲上三角行列式。 就可以通過外面的係數,乘以主對角

原创 How to commit no change and new message?

How to commit no change and new message? 回答1 There's rarely a good reason to do this, but the parameter is --allow-empty

原创 Get first day of week in SQL Server

Get first day of week in SQL Server 回答1 To answer why you're getting a Monday and not a Sunday: You're adding a number

原创 數學教授爲什麼仍然使用粉筆?

數學教授爲什麼仍然使用粉筆? 斯坦福大學幾乎 100% 的數學系教師,依然使用粉筆和黑板授課。不僅老師們喜歡用粉筆,學生們也非常接受這種方式。 一個數學講師曾經調查班上的51名同學,更喜歡黑板上的板書,還是用投影儀展示講義?學生們一致反映

原创 git log History Simplification

History Simplification A more detailed explanation follows. Suppose you specified foo as the <paths>. We shall call c

原创 一起理解 Virtual DOM 詳解Vue中的虛擬DOM

一起理解 Virtual DOM     詳解Vue中的虛擬DOM  前言 Vue.js 2.0引入Virtual DOM,比Vue.js 1.0的初始渲染速度提升了2-4倍,並大大降低了內存消耗。那麼,什麼是Virtual DOM?爲

原创 excel 使用技巧

 Excel 2007如何用countif()函數統計性別?     Excel單列數據如何剔除重複值  

原创 INF: How SQL Server Compares Strings with Trailing Spaces

The Surprising Behavior of Trailing Spaces       INF: How SQL Server Compares Strings with Trailing Spaces