multiholle questions

• Android activity navigation save state
• Matrix multiplication: Strassen vs. Standard
• setgid() fails - operation not permitted
• Overlay a color over a view
• Raw Type Warning in Android Studio
• Create generic Interface restricted to own class
• Print arrays in Java
• Margin ignored by LinearLayout
• Length prefix for protobuf messages in C++
• "+" operator for Java-classes

multiholle answers