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Where do “pure virtual function call” crashes come from?
...bject hasn't been constructed or has already been destroyed), it calls the base class version, which in the case of a pure virtual function, doesn't exist.
(See live demo here)
class Base
{
public:
Base() { doIt(); } // DON'T DO THIS
virtual void doIt() = 0;
};
void Base::doIt()
{
s...
Should I use Python 32bit or Python 64bit
... for help, clarification, or responding to other answers.Making statements based on opinion; back them up with references or personal experience.To learn more, see our tips on writing great answers.
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What's the maximum value for an int in PHP?
...automatically determine when this switch to floating point needs to happen based on whether the result value of a calculation can't be represented as an integer.
PHP has no support for "unsigned" integers as such, limiting the maximum value of all integers to the range of a "signed" integer.
...
How to measure time in milliseconds using ANSI C?
...igh-resolution clock sources).
The second way provides a (date)time value based on the current system clock value. It may also have a high resolution, but it has one major drawback: this kind of time value can be affected by different system time adjustments, i.e. time zone change, daylight saving ...
How do I check OS with a preprocessor directive?
I need my code to do different things based on the operating system on which it gets compiled. I'm looking for something like this:
...
Google Authenticator implementation in Python
...ected with incorrect value of secret key (it must be correct parameter for base64.b32decode() function).
Below I post full working solution with explanation on how to use it.
Code
The following code is enough. I have also uploaded it to GitHub as separate module called onetimepass (available here...
Link to all Visual Studio $ variables
...tMetadataClHostArchDir)
$(AppxManifestMetadataCITargetArchDir)
$(Attach)
$(BaseIntermediateOutputPath)
$(BuildingInsideVisualStudio)
$(CharacterSet)
$(CLRSupport)
$(CommonProgramFiles)
$(CommonProgramW6432)
$(COMPUTERNAME)
$(ComSpec)
$(Configuration)
$(ConfigurationType)
$(CppWinRT_IncludePath)
$(Cr...
重构理论及实践——用工厂模式重构c++后台代码 - C/C++ - 清泛网 - 专注C/C...
...到本例，从可维护性的角度，消息cmd和processor factory是硬编码耦合的，当前情况下没什么问题，但脑洞开一点，业务规模增加到足够大时，框架和消息可能由两拨人来维护，此时是不是用注册回调的观察者模式，可以使业务的人...
泰迪熊为什么叫泰迪 - 杂谈 - 清泛网 - 专注C/C++及内核技术
...能满足于主干故事，总要挖掘出点八卦才肯罢休的。比较失败的是原本打算一笔带过的主干故事被我写的很长，其实里面还隐藏着很多的扩展点，这其中才有些有意思的故事——
1. 猎熊故事的大结局
罗斯福拒绝猎杀拴住的熊...
The application was unable to start correctly (0xc000007b)
...
based on the Windows Error Codes (google.de/…), this Error Code means: 0xC000007B STATUS_INVALID_IMAGE_FORMAT.
– mox
May 8 '12 at 5:43
...