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Xcode source automatic formatting
...ghly dependent on the automatic formatting in Visual Studio 2008. Specifically, I will use the CTRL + K , D keyboard shortcut to force things back into shape after my sloppy implementation.
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How does SSL really work?
...he name that is most often used to refer to this protocol, but SSL specifically refers to the proprietary protocol designed by Netscape in the mid 90's. "TLS" is an IETF standard that is based on SSL, so I will use TLS in my answer. These days, the odds are that nearly all of your secure connections...
What is the difference between Xamarin.Form's LayoutOptions, especially Fill and Expand?
...lignment the view is moved to the top. For horizontal alignment this is usually the left-hand side. (But note, that on devices with right-to-left language setting this is the other way around, i.e. right aligned.)
Center: The view is centered.
End: Usually the view is bottom or right aligned. (On ri...
How to create a directory and give permission in single command
... in the path you type. For example, mkdir -p -m 707 one/two/three. Even if all three directories are newly created, only the last one will have the requested permissions, and the others, default. install -d -m is broken the same way.
– Display Name
May 6 '15 at...
Optimal settings for exporting SVGs for the web from Illustrator?
...VG logo for a website — to make it look great on a responsive design for all devices.
2 Answers
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MYSQL OR vs IN performance
...than using OR.
Do not believe people who give their "opinion", science is all about testing and evidence.
I ran a loop of 1000x the equivalent queries (for consistency, I used sql_no_cache):
IN: 2.34969592094s
OR: 5.83781504631s
Update:
(I don't have the source code for the original test, as it...
Becoming better at Vim [closed]
...hose #?@! nutheads use vi?" is a nice introduction to "the Vim way", especially about text objects which are one of the most defining features of Vim.
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Node.js setting up environment specific configs to be used with everyauth
I am using node.js + express.js + everyauth.js. I have moved all my everyauth logic into a module file
9 Answers
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Get top n records for each group of grouped results
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Here is one way to do this, using UNION ALL (See SQL Fiddle with Demo). This works with two groups, if you have more than two groups, then you would need to specify the group number and add queries for each group:
(
select *
from mytable
where `group` = 1
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LPCSTR, LPCTSTR and LPTSTR
...rase for simplicity, but as mentioned by lightness-races-in-orbit they are all pointers.
This is a great codeproject article describing C++ strings (see 2/3 the way down for a chart comparing the different types)
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