The reason for this, is that these invocations are in fact, invocations to two different overloaded methods available in ExecutorService; each of these methods taking a single argument of different types: <T> Future<T> submit(Callable<T> task); 2. Future<?> submit(Runnable task); Then what happens is that the compiler is converting the lambda in the first case of … Read more
In my case I had a library module with an abstract application class implementing Dagger’s HasActivityInjector and an application module with a dependency to the library and its own (non-abstract) application class extending the base app class. My Gradle dependencies were implementations, and therefore not accessible to the application module’s application class (even though there … Read more
The functions in stdlib.h and stdio.h have implementations in libc.so (or libc.a for static linking), which is linked into your executable by default (as if -lc were specified). GCC can be instructed to avoid this automatic link with the -nostdlib or -nodefaultlibs options. The math functions in math.h have implementations in libm.so (or libm.a for … Read more
There’s no mystery here, the linker is telling you that you haven’t defined the missing symbols, and you haven’t. Similarity::Similarity() or Similarity::~Similarity() are just missing and you have defined the others incorrectly, void Similarity::readData(Scanner& inStream){ } not void readData(Scanner& inStream){ } etc. etc. The second one is a function called readData, only the first is … Read more
Tomcat 8.5. Inside catalina.properties, located in the /conf directory set: tomcat.util.scan.StandardJarScanFilter.jarsToSkip=\*.jar Or go into context.xml, located in Tomcat’s /conf directory and add: <JarScanner scanClassPath=”false”/>
You must use std::abs, which has overloads for the primitive types. You are falling through to the C++ version in one case, and the old C version (which converts its parameters to integral types) in the other. Things to avoid: (1) using namespace std; (here is why) and (2) not having the appropriate #includes to … Read more
Cross-compilation is the act of compiling code for one computer system (often known as the target) on a different system, called the host. It’s a very useful technique, for instance when the target system is too small to host the compiler and all relevant files. Common examples include many embedded systems, but also typical game … Read more
There has been a lot of discussion regarding this topic, mainly here, but not clear conclusion. You are on the right track: currently the best solution is to declare your own provided configuration, that will included compile-only dependencies and add to to your compile classpath: configurations{ provided } dependencies{ //Add libraries like lombok, findbugs etc … Read more
build – dependency that is only needed by the build process runtime – dependency that is needed to run the application, but not compile it e.g. JDBC implementation for specific database vendor. This would not typically be needed at compile-time because code depends only the JDBC API, rather than a specific implementation thereof compile – … Read more
The final } of the method is unreachable – you only get a compilation error if it’s possible to get to the end of the method without returning a value. This is more useful for cases where the end of the method is unreachable due to an exception, e.g. private String find(int minLength) { for … Read more