UPDATE 2018: By default, Go programs run with GOMAXPROCS set to the number of cores available; in prior releases it defaulted to 1. Starting from Go 1.5, the default value is the number of cores. You only need to explicitly set it if you are not okay with this in newer Go versions. No, there’s … Read more
You need to capture both the std out and std err in the process. You can then write std out to a file/mail or similar. See this article for more info, and in particular note the StreamGobbler mechanism that captures stdout/err in separate threads. This is essential to prevent blocking and is the source of … Read more
There is no executable called cd, because it can’t be implemented in a separate process. The problem is that each process has its own current working directory and implementing cd as a separate process would only ever change that processes current working directory. In a Java program you can’t change your current working directory and … Read more
A good way to do this would be with build configurations and C macros. This avoids having to create a separate target for every configuration which is not really the correct use of targets. First you want to set up the configurations at the project level: You can create different configurations for debugging, enterprise distribution, … Read more
You can either use the open-source HotSpot VM or the commercial JRebel IDE plugin to easily achieve your goal (view comparison table here).
It boils down to two things: __import__ is a Python function that will import a package using a string as the name of the package. It returns a new object that represents the imported package. So foo = __import__(‘bar’) will import a package named bar and store a reference to its objects in a local … Read more
Yes, of course, without any tools mentioned in the other answers, but simply using the C++ compiler. just follow these steps from within your C++ program (on linux, but must be similar on other OS) write a C++ program into a file (e.g. in /tmp/prog.cc), using an ofstream compile the program via system(“c++ /tmp/prog.cc -o … Read more
No. What you can do with an app that has very variable heap requirements is to set your max heap size very high with -Xmx and tune -XX:MaxHeapFreeRatio and -XX:MinHeapFreeRatio so that the app will not hang on to a lot of memory when the heap shrinks (it does that with default settings). But note … Read more
AFAIK, the Django settings are supposed to be immutable. There are multiple reasons for this, the most obvious being that Django is not aware of the server’s execution model (prefork / multi-threaded). Also, you can’t load the settings themselves from a Django model because the settings need to be loaded before you can use anything … Read more
constexpr functions will be evaluated at compile time when all its arguments are constant expressions and the result is used in a constant expression as well. A constant expression could be a literal (like 42), a non-type template argument (like N in template<class T, size_t N> class array;), an enum element declaration (like Blue in … Read more