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Yes/No message box using QMessageBox
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PHP Fatal error: Cannot redeclare class
...ious repetition like this (even in quite a complex situation). The include_once tip helps to clarify an obscure feature of PHP.
– DavidHyogo
Mar 20 '13 at 2:12
2
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Mark parameters as NOT nullable in C#/.NET?
...nts null from being passed in C#/.NET? Ideally this would also check at compile time to make sure the literal null isn't being used anywhere for it and at run-time throw ArgumentNullException .
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Struct constructor: “fields must be fully assigned before control is returned to the caller.”
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List of lists changes reflected across sublists unexpectedly
...at you create a new list at each position. One way to do it is
[[1]*4 for _ in range(3)]
which will reevaluate [1]*4 each time instead of evaluating it once and making 3 references to 1 list.
You might wonder why * can't make independent objects the way the list comprehension does. That's beca...
设备信息使用指导 · App Inventor 2 中文网
...发事件）、Android 系统版本与 SDK 级别、手机型号、ANDROID_ID、
系统语言、定位开关、电量、是否充电、电池温度（电量或充电状态变化时触发事件）。
本应用的版本名、安装来源、是否首次运行，以及返回桌面、打开系统设置...
Performance of Arrays vs. Lists
...
The link mentioned in the above comment by Jon to Jon Skeet's blog was broken. Below is the updated link. codeblog.jonskeet.uk/2009/01/29/…
– Josh DeLong
Oct 20 '14 at 13:54
...
Most efficient way to create a zero filled JavaScript array?
...ke it because it's short and self-describing.
It's still not in IE (check compatibility), but there's a polyfill available.
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Fastest way to flatten / un-flatten nested JSON objects
I threw some code together to flatten and un-flatten complex/nested JSON objects. It works, but it's a bit slow (triggers the 'long script' warning).
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How can I reliably get an object's address when operator& is overloaded?
...d of boost::addressof.
Let us first copy the code from Boost, minus the compiler work around bits:
template<class T>
struct addr_impl_ref
{
T & v_;
inline addr_impl_ref( T & v ): v_( v ) {}
inline operator T& () const { return v_; }
private:
addr_impl_ref & operat...