Chuck Lu

摘要： Finding null value in Dataset - DataRow.IsNull method vs ==DbNull.Value - c# 问题 What are the benefits of using the c# method DataRow.IsNull to determi 阅读全文

摘要： 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 unique keys (2128 or 3.4×1038) is 阅读全文

摘要： SQL Server discarding SPACE during GROUP BY 问题 Looks like SQL Server (tried on 2008 R2) is doing an RTRIM on columns in GROUP BY clause. Did anyone no 阅读全文

摘要： 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 rollback the entire transaction 阅读全文

摘要： How can I get bootstrap version via javascript? 回答1 The version of each of Bootstrap's jQuery plugins can be accessed via the VERSION property of the 阅读全文

摘要： Twitter Bootstrap Carousel autoplay on load 回答1 you should do as the Twitter Bootstrap Documentation says about Carousel, so set the first Carousel sl 阅读全文

摘要： 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 a gui, which may help you track 阅读全文

摘要： 幂指函数_百度百科 (baidu.com) What is the value of limit x^(1/(x-1)) as x tends to 1? 阅读全文

摘要： 主对角线(从左上角到右下角这条对角线)下方的元素全为零的行列式称为上三角行列式。一个n阶行列式若能通过变换，化为上三角行列式，则计算该行列式就很容易了。 通过初等变换，把普通的行列式转换为上三角行列式。 就可以通过外面的系数，乘以主对角线(从左上角到右下角这条对角线)上的元素，得到行列式的值。 需要 阅读全文

摘要： 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 for empty commits (no files c 阅读全文