In this post, we will see how to resolve Java implement accumulator class that provides a Collector Question: A Collector has three generic types: With A being the mutable accumulation type of the reduction operation (often hidden as an implementation ...
Question: Given a dataframe df, how to calculate the rolling count of unique values through rows’ direction subject to a boundary condition: window size = n? Input data: Expected output (with window size = 2): For the example above with ...
Question: I am dealing with a real-time, never-ending stream of objects. Is there way to have a variable keeping its value from object to object without waiting until the end of the stream, outputting it immediately after JQ processed the ...
Question: I’m using OpenCV to access the color data of the pixels within a specified area and currently I’m trying to use the accumulate method in c++ to sum up all the data numbers obtained in that specified area. But ...
Question: I want to use the new parallel facilities of C++17 but my computer don’t. This works : But this does not work : Here the error message : I do include what it is needed (i guess): I always ...
Question: My struct is a 2D coordinate: I have a std::vector<coordinate<double>> vec and would like to get averages of x and of y coordinates across the vector. My way is (please don’t judge) I assume there is a more suitable ...