For lightweight randomnes (e.g. games), you could certainly consider default_random_engine. But if your code depends heavily on quality of randomness (e.g. simulation software), you shouldn’t use it, as it gives only minimalistic garantees: It is the library implemention’s selection of a generator that provides at least acceptable engine behavior for relatively casual, inexpert, and/or lightweight … Read more
It’s called exactly to avoid problems. A new object serving as result is initialized from the locally-defined object, then the locally defined object is destroyed. In case of deep-copy user-defined constructor it’s all the same. First storage is allocated for the object that will serve as result, then the copy constructor is called. It uses … Read more
Once you map a file in memory, you cannot increase its size. This is a known limitation of memory mapped files. …you must calculate or estimate the size of the finished file because file mapping objects are static in size; once created, their size cannot be increased or decreased. One strategy would be to use … Read more
Do you mean a Rest Web Service? With Rest, there is no service definition page, like with WCF or ASMX. Usually people want to use a Rest API with JSON.. however.. if you are just looking for a JSON output, and you want your clients to quickly be able to connect to your service, you … Read more
This ended up being an issue with using an old version of CMake. I ended up installing the newest version and it worked as expected. According to Clang docs “Currently CMake (since 2.8.5) supports generation of compilation databases for Unix Makefile builds (Ninja builds in the works) with the option CMAKE_EXPORT_COMPILE_COMMANDS.”
The simple answer is to use strtoul() instead. The longer answer is that even if all you needed was signed 32 bit integers or were happy with 31 bits for unsigned, the atoi() function is a poor fit for what you appear to be doing. As you have already noted, the atoi() function converts a … Read more
If you want the actual implementations, as everyone else has assumed you don’t, many Linux distributions currently use glibc to implement the C standard library. Common alternatives include musl libc, diet libc, uClibc, and Bionic
Thanks so much to @Justin and @Petro for your answers, which have helped me immensely. The solution I have come up with is a combination of the techniques you suggested. The solution described below provides a new database for each run of the tests, and a separate transaction for each test. I added a connection … Read more
as of .net 2.x, if you’re using cookie auth, ensure you include the authenticationScheme and specify name and role claim types, the identity and auth properties. //You should specify the ‘types’ of the claims which acts as ‘name’ and ‘role’, furthermore, you should have claims with those types in your claimsIdentity like that var identity … Read more
It’s something introduced in C99 which lets the compiler know that the pointer passed in there isn’t pointing to the same place as any other pointers in the arguments. If you give this hint to the compiler, it can do some more aggressive optimizations without breaking code. As an example, consider this function: int add(int … Read more