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Fastest hash for non-cryptographic uses?
...x). It's perfect to look for duplicates and very appropriate for HashTable indexes.
In fact it's used by many of the modern databases (Redis, ElastisSearch, Cassandra) to compute all sort of hashes for various purposes. This specific algorithm was the root source of many performance improvements in...
How to check existence of user-define table type in SQL Server 2008?
...
You can look in sys.types or use TYPE_ID:
IF TYPE_ID(N'MyType') IS NULL ...
Just a precaution: using type_id won't verify that the type is a table type--just that a type by that name exists. Otherwise gbn's query is probably better.
...
深入理解 x86/x64 的中断体系 - 操作系统(内核) - 清泛网 - 专注C/C++及内核技术
...下变得异常复杂，你需要为 new task 准备一个 task 信息的 TSS，然而你必须事先要设置好当前的 TSS 块，也就是说，系统中应该有两个 TSS 块：
current TSS
TSS of new task
当前的 TSS 是系统初始化设置好的，这个 TSS 的作用是：当发...
Performing Breadth First Search recursively
... Nice. I overlooked the fact that we are dealing with a binary tree. The indexes can be assigned using a DFS. BTW, you forgot a return false at the first case.
– sisis
Mar 31 '10 at 1:33
...
What is the difference between user and kernel modes in operating systems?
...al_Descriptor_Table
the segment registers CS, DS, etc., which point to the index of an entry in the GDT.
For example, CS = 0 means the first entry of the GDT is currently active for the executing code.
What can each ring do?
The CPU chip is physically built so that:
ring 0 can do anything
ri...
Django: Set foreign key using integer?
...
Yep:
employee = Employee(first_name="Name", last_name="Name")
employee.type_id = 4
employee.save()
ForeignKey fields store their value in an attribute with _id at the end, which you can access directly to avoid visiting the database.
The _id version of a ForeignKey is a particularly useful as...
How does a debugger work?
...dware debugging registers. Following is from that chapter:
T (trap) flag, TSS — Generates a debug exception (#DB) when an attempt is
made to switch to a task with the T flag set in its TSS.
I am not sure whether Window or Linux use this flag or not, but it is very interesting to read that chapte...
MFC CListCtrl使用方法详解 - C/C++ - 清泛网 - 专注C/C++及内核技术
...le.php/c983/
http://www.vchelp.net/vchelp/archive.asp?type_id=9&class_id=1&cata_id=1&article_id=1088&search_term=
(16) 自适应宽度的listctrl
http://www.codeproject.com/useritems/AutosizeListCtrl.asp
(17) 改变ListCtrl高...
Perform an action in every sub-directory using Bash
... with ./ as opposed to accepted answer
– Hayri Uğur Koltuk
Feb 5 '14 at 11:00
3
...
grep a file, but show several surrounding lines?
...n, although mentioned in my man pages.
– Hayri Uğur Koltuk
Aug 1 '12 at 9:43
2
If you are HP-UX ...