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Useful GCC flags for C
... "undefined behaviour" in C).
-fverbose-asm is useful if you're compiling with -S to examine the assembly output - it adds some informative comments.
-finstrument-functions adds code to call user-supplied profiling functions at every function entry and exit point.
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Convert a Git folder to a submodule retrospectively?
Quite often it is the case that you're writing a project of some kind, and after a while it becomes clear that some component of the project is actually useful as a standalone component (a library, perhaps). If you've had that idea from early on, then there's a fair chance that most of that code is ...
Debug Error \"pure virtual function call\" 原因解析 - 更多技术 - 清泛...
...
public:
virtual void virtualFunc(){}
};
Base* pB = new Derived;
__try
{
delete pB; // . . . b)
pB = NULL;
}
__except(EXCEPTION_EXECUTE_HANDLER){
}
pB->virtualFunc(); // . . . c)
在b)处析构Derived对象的时候，在其基类析构函数中a)处抛出了...
How do I get PyLint to recognize numpy members?
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If using Visual Studio Code with Don Jayamanne's excellent Python extension, add a user setting to whitelist numpy:
{
// whitelist numpy to remove lint errors
"python.linting.pylintArgs": [
"--extension-pkg-whitelist=numpy"
]
}
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What's the best way to unit test protected & private methods in Ruby?
What's the best way to unit test protected and private methods in Ruby, using the standard Ruby Test::Unit framework?
16 ...
Is it possible to ping a server from Javascript?
...quires that I check to see if remote servers are online or not. When I run it from the command line, my page load goes up to a full 60s (for 8 entries, it will scale linearly with more).
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Height equal to dynamic width (CSS fluid layout) [duplicate]
Is it possible to set same height as width (ratio 1:1)?
9 Answers
9
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MongoDB and “joins” [duplicate]
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It's no join since the relationship will only be evaluated when needed. A join (in a SQL database) on the other hand will resolve relationships and return them as if they were a single table (you "join two tables into one").
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Calculate distance between two points in google maps V3
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If you want to calculate it yourself, then you can use the Haversine formula:
var rad = function(x) {
return x * Math.PI / 180;
};
var getDistance = function(p1, p2) {
var R = 6378137; // Earth’s mean radius in meter
var dLat = rad(p2.lat()...
AngularJS: Basic example to use authentication in Single Page Application
I am new to AngularJS and gone through their tutorial and got a feel for it.
6 Answers
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