contiguous

We have a chat system that generates multiple event logs per second sometimes for every event during a chat. The issue is that these consume a massive amount of data storage (which is very expensive on that platform) and we'd like to streamline what we actually store and delete things that really aren't necessary. To that end, there's an event type for what position in the queue the chat is. We don't care about each position as long as they are not intervening events for that chat. So we want to keep only the first and last in each distinct group where there were no other event types to just

when using skimage I get the following error: win = skimage.util.view_as_windows(x, windowSize, windowShift) C:\Program Files\Anaconda2\lib\site-packages\skimage\util\shape.py:247: RuntimeWarning: Cannot provide views on a non-contiguous input array without copying. warn(RuntimeWarning("Cannot provide views on a non-contiguous input " as far I understood this is because x is a non contiguous array. I think I solved the problem adding in my code np.ascontiguousarray as below: win = skimage.util.view_as_windows(np.ascontiguousarray(x), windowSize, windowShift) Is this the right thing to do? Note

I want to pass a string with multiple contiguous spaces as a parameter to a jar file using Windows command prompt called in another java program. The java file is something like this which prints all of its arguments: package src; public class myClass { public static void main(String[] args) { for(int i = 0; i < args.length; i++) { System.out.println("args" + i+ ":" + args[i]); } } } Now, this is how I call the above main method from another java program and print the output: package src; import java.io.BufferedReader; import java.io.IOException; import java.io.InputStreamReader; public class

I need to allocate contiguous space for a 3D array. (EDIT:) I GUESS I SHOULD HAVE MADE THIS CLEAR IN THE FIRST PLACE but in the actual production code, I will not know the dimensions of the array until run time. I provided them as constants in my toy code below just to keep things simple. I know the potential problems of insisting on contiguous space, but I just have to have it. I have seen how to do this for a 2D array, but apparently I don't understand how to extend the pattern to 3D. When I call the function to free up the memory, free_3d_arr , I get an error: lowest lvl mid lvl a.out(2248

My problem is conceptually simple. I am looking for a computationally efficient solution of it (my own one I attach at the end). Suppose we have a potentially very large sparse matrix like the one on the left below and want to 'name' every area of contiguous non-zero elements with a separate code (see matrix on the right) 1 1 1 . . . . . 1 1 1 . . . . . 1 1 1 . 1 1 . . 1 1 1 . 4 4 . . 1 1 1 . 1 1 . . 1 1 1 . 4 4 . . . . . . 1 1 . . ---> . . . . 4 4 . . . . 1 1 . . 1 1 . . 3 3 . . 7 7 1 . 1 1 . . 1 1 2 . 3 3 . . 7 7 1 . . . 1 . . . 2 . . . 5 . . . 1 . . . . 1 1 1 2 . . . . 6 6 6 In my

Is the memory in std::array contiguous? Is the following valid/good practice? std::array<type1,Num> arr = //initialize value type1 * ptr = &arr[0]; Could I then pass ptr to functions expecting a c-style array? Yes, it is contiguous, as it is basically (and actually) a type arr[10]; , but with STL like interface. It also doesn't decay to a pointer on the slightest provocation. You can safely pass &arr[0] to a function expecting a C-style array, that's the design goal of it. To use it with the STL algorithms however, just use the begin and end functions: // either members std::sort(arr.begin(),

I read that std::vector should be contiguous. My understanding is, that its elements should be stored together, not spread out across the memory. I have simply accepted the fact and used this knowledge when for example using its data() method to get the underlying contiguous piece of memory. However, I came across a situation, where the vector's memory behaves in a strange way: std::vector<int> numbers; std::vector<int*> ptr_numbers; for (int i = 0; i < 8; i++) { numbers.push_back(i); ptr_numbers.push_back(&numbers.back()); } I expected this to give me a vector of some numbers and a vector of