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What is the fastest/most efficient way to find the highest set bit (msb) in an integer in C?
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Which one ? BSR or CNTLZ ? As I read the x86-timing.pdf referenced above, BSR is only slow on the Netburst Pentiums. I know nothing about PowerPC though.
– timday
Mar 23 '09 at 9:26
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GridCtrl 控件FAQ - C/C++ - 清泛网 - 专注C/C++及内核技术
...只读
CGridCtrlObject.SetItemState(1,1, m_Grid.GetItemState(1,1) | GVIS_READONLY);
将单元格（1，1）设为正常
CGridCtrlObject.SetItemState(1,1, m_Grid.GetItemState(1,1) & ~GVIS_READONLY);
单元格可用的状态常量
&nnbsp; GVIS_FOCUSED // Cell has focus
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Insert, on duplicate update in PostgreSQL?
...1 FROM table WHERE id=3);
The UPDATE will succeed if a row with "id=3" already exists, otherwise it has no effect.
The INSERT will succeed only if row with "id=3" does not already exist.
You can combine these two into a single string and run them both with a single SQL statement execute from you...
Java code To convert byte to Hexadecimal
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@Vivek: read my answer about using toHexString. You have to mask it with & 0xFF, i.e. Integer.toHexString(-46 & 0xFF) is "d2".
– polygenelubricants
May 13 '10 at 10:49
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MFC Grid control 2.27 - C/C++ - 清泛网移动版 - 专注C/C++及内核技术
...and there is still no end in sight. Most of the fixes have been sent in by readers so I'm trusting that they have done sufficient testing.
Release 2.27 is a minor update of 2.26 for Visual Studio 2010 and includes a couple of minor bug fixes. Version 2.26 has is still available for download above.
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ExpressJS How to structure an application?
...nd created a scaffolding github repository with JavaScript code and a long README about how I like to structure a medium-sized express.js application.
focusaurus/express_code_structure is the repo with the latest code for this. Pull requests welcome.
Here's a snapshot of the README since stackover...
What's the difference between streams and datagrams in network programming?
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A long time ago I read a great analogy for explaining the difference between the two. I don't remember where I read it so unfortunately I can't credit the author for the idea, but I've also added a lot of my own knowledge to the core analogy ...
Retrieving the last record in each group - MySQL
...searching for the last request_id for each test_id.
Bill's solution has already been running for several hours on my dell e4310 and I do not know when it is going to finish even though it operates on a coverage index (hence using index in EXPLAIN).
I have a couple of other solutions that are based...
Should I Dispose() DataSet and DataTable?
...mplete understanding of the framework we rely on everyday).
After lots of reading, here’s my understanding:
If an object requires finalization, it could occupy memory longer than it needs to – here’s why: a) Any type that defines a destructor (or inherits from a type that defines a destructo...
UTF-8: General? Bin? Unicode?
...an/5.0/en/charset-unicode-sets.html
For more detailed explanation, please read the following post from MySQL forums:
http://forums.mysql.com/read.php?103,187048,188748
As for utf8_bin:
Both utf8_general_ci and utf8_unicode_ci perform case-insensitive comparison. In constrast, utf8_bin is case-sens...