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What does T&& (double ampersand) mean in C++11?
...e been looking into some of the new features of C++11 and one I've noticed is the double ampersand in declaring variables, like T&& var .
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Are static variables shared between threads?
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There isn't anything special about static variables when it comes to visibility. If they are accessible any thread can get at them, so you're more likely to see concurrency problems because they're more exposed.
There is a visibili...
What is the difference between Integrated Security = True and Integrated Security = SSPI?
...ed values are true, false, yes, no, and sspi (strongly recommended), which is equivalent to true.
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Android Facebook style slide
The new Facebook application and its navigation is so cool. I was just trying to see how it can be emulated in my application.
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Android: upgrading DB version and adding new table
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1. About onCreate() and onUpgrade()
onCreate(..) is called whenever the app is freshly installed. onUpgrade is called whenever the app is upgraded and launched and the database version is not the same.
2. Incrementing the db version
You need a constructor like:
MyOpen...
Convert Decimal to Double
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An explicit cast to double like this isn't necessary:
double trans = (double) trackBar1.Value / 5000.0;
Identifying the constant as 5000.0 (or as 5000d) is sufficient:
double trans = trackBar1.Value / 5000.0;
double trans = trackBar1.Value / 5000d;
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Differences between Oracle JDK and OpenJDK
...For example, IBM J9, Azul Zulu, Azul Zing, and Oracle JDK.
Almost every existing JDK is derived from OpenJDK.
As suggested by many, licensing is a change between JDKs.
Starting with JDK 11 accessing the long time support Oracle JDK/Java SE will now require a commercial license. You should now p...
理解Python的 with 语句 - 大数据 & AI - 清泛网 - 专注C/C++及内核技术
...o a setup and teardown to make something happen. A very good example for this is the situation where you want to gain a handler to a file, read data from the file and the close the file handler.
有一些任务，可能事先需要设置，事后做清理工作。对于这种场景，Python的with...
The entity cannot be constructed in a LINQ to Entities query
There is an entity type called Product that is generated by entity framework.
I have written this query
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What's the right OAuth 2.0 flow for a mobile app
...ant flow does not support refresh tokens, which means once an access token is granted for an specific period of time, the user must grant permissions to the app again once the token expires or it is revoked.
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