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What differences, if any, between C++03 and C++11 can be detected at run-time?
It is possible to write a function, which, when compiled with a C compiler will return 0, and when compiled with a C++ compiler, will return 1 (the trivial sulution with
#ifdef __cplusplus is not interesting).
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Should I use Java's String.format() if performance is important?
...e to build Strings all the time for log output and so on. Over the JDK versions we have learned when to use StringBuffer (many appends, thread safe) and StringBuilder (many appends, non-thread-safe).
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联网 App 第 4 课：图片上传，压缩后用 Web 客户端传到服务器、列表直接显...
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How to find serial number of Android device?
...DeviceID() will return the MDN or MEID of the device depending on which radio the phone uses (GSM or CDMA).
Each device MUST return a unique value here (assuming it's a phone). This should work for any Android device with a sim slot or CDMA radio. You're on your own with that Android powered mi...
Are there best practices for (Java) package organization? [closed]
A little while ago, I saw a question answered here regarding the fine-grained organization of java packages. For example, my.project.util , my.project.factory , my.project.service , etc.
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Python - When to use file vs open
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You should always use open().
As the documentation states:
When opening a file, it's preferable
to use open() instead of invoking this
constructor directly. file is more
suited to type testing (for example,
writing "isinstance(f, file)").
Also, file() has be...
JavaScript data grid for millions of rows [closed]
I need to present a large number of rows of data (ie. millions of rows) to the user in a grid using JavaScript.
19 Answers
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Resize svg when window is resized in d3.js
I'm drawing a scatterplot with d3.js. With the help of this question :
Get the size of the screen, current web page and browser window
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Preview layout with merge root tag in Intellij IDEA/Android Studio
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There is a new parentTag tools attribute (added in Android Studio 2.2) that you can use to specify the layout type for a merge tag, which will make the layout render correctly in the layout editor preview.
So using your example:
<merge xmlns:android="http://schemas.android.com/apk/...
Spring - @Transactional - What happens in background?
...nt to know what actually happens when you annotate a method with @Transactional ?
Of course, I know that Spring will wrap that method in a Transaction.
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