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Do try/catch blocks hurt performance when exceptions are not thrown?
...c language features to behave correctly, and optimize what we can control (sql, indexes, algorithms).
– Kobi
Aug 22 '09 at 16:13
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How does the Amazon Recommendation feature work?
...ed out in commerce server) have moved on to live directly within Microsoft SQL.
The four big take-a-ways you should have are:
Amazon (or any retailer) is looking at aggregate data for tons of transactions and tons of people... this allows them to even recommend pretty well for anonymous users o...
MySQL vs MongoDB 1000 reads
...t MongoDb and have been testing it lately. I had a table called posts in MySQL with about 20 million records indexed only on a field called 'id'.
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Is VB really case insensitive?
...ase sensitive. String comparisons are usually case sensitive, unlike say T-SQL, but there are compiler switch to make string comparisons case insensitive. And of course there are the edge cases when dealing with inheritance, COM, and Dynamic Language Runtime.
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How do you do Impersonation in .NET?
... types. LOGON32_LOGON_INTERACTIVE was the first enum value that worked for sql server. My connection string was just trusted. No user name / password in the connection string.
<PermissionSet(SecurityAction.Demand, Name:="FullTrust")> _
Public Class Impersonation
Implements IDisposable...
Entity Framework DateTime and UTC
...tatype. This will store the time zone with the date value in the database (SQL Server 2015 in my case).
When EF Core requests the data from the DB it will receive the timezone info as well.
When you pass this data to a web application (Angular2 in my case) the date is automatically converted to the...
Why is String immutable in Java?
...ble. *** Example - Name one technique to attack the DB of a web app --> SQL Injection. Do you know any techniques like this for attacking the references ?
– MasterJoe
Jul 25 '18 at 17:31
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PostgreSQL: Is it better to use multiple databases with one schema each, or one database with multip
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A PostgreSQL "schema" is roughly the same as a MySQL "database". Having many databases on a PostgreSQL installation can get problematic; having many schemas will work with no trouble. So you definitely want to go with one database and...
What does a Ajax call response like 'for (;;); { json data }' mean? [duplicate]
...g as simple and serious as failing to escape data inserted into an HTML or SQL template or something as intricate and subtle as using eval (sometimes inefficient and arguably insecure) or JSON.parse (a compliant but not universally implemented extension) instead of a "known good" JSON decoder, it is...
廉价共享存储解决方案1-drbd+ha+nfs - 更多技术 - 清泛网 - 专注C/C++及内核技术
...没有这种情况，那么建议不要启动，启动 了会降低NFS的性能：/sbin/rpc.lockdecho “/sbin/rpc.lockd” >>/etc/rc.local
5安装Heartbeat
5.1 下载安装包
由于实验机器没法上网 从网上下载Heartbeat的安装包并使用Xftp工具上传到share1和2
下...