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Top new questions this week:

Split string in half and change case accordingly

I found the following challenge online: Create a function that takes a string and returns that string with the first half lowercased and the last half uppercased. eg: foobar == fooBAR ...

python strings programming-challenge

asked by Seth 12 votes answered by rolfl 15 votes

Greatest Common Factor

I wrote this program to determine the Greatest Common Factor of any 2 given numbers, and would like to know of any improvements that can be made. I have tested it using a loop and 2 randomly generated ...

java performance

asked by user3189142 10 votes answered by Legato 13 votes

Printing a pyramid

Can you please review this code to determine if it's good or can be improved? #include "stdafx.h" #include <iostream> #include <string> using namespace std; int _tmain(int argc, _TCHAR* ...

c++ beginner formatting

asked by user70827 8 votes answered by Hosch250 5 votes

Brute Force N Body Implementation in C++

I have wrote the following code in C++ for the n-body problem. This code is sequential as later on I am planning to parallelize it using OpenMP. I want to know whether I have wrote the correct ...

c++ simulation physics

asked by Jamal Hussain 8 votes answered by Edward 13 votes

Fastest sum of absolute values of 32 differences

A long should be treated as a list of 32 unsigned numbers, each of them just two bit long. So 0x1234F... represents {0, 1, 0, 2, 0, 3, 1, 0, 3, 3, ...} and 0x55AA0... represents {1, 1, 1, 1, 2, 2, ...

java performance bitwise integer

asked by maaartinus 8 votes answered by rolfl 4 votes

Simple comparison of sorting algorithms in C++

I know this has been done a million times before, but this is my implementation of bubble-sort, insertion-sort, merge-sort, heap-sort, and quicksort. Any feedback on how to make it better would be ...

c++ algorithm c++11 sorting

asked by Jason B 8 votes answered by Loki Astari 13 votes

JPaint (Java painting app)

I have this painting app called JPaint in Java and I'm wondering if it could be improved. The variable declaration seems repetitive and long, and I think it might be able to be improved. public class ...

java swing event-handling graphics

asked by thecoder16 7 votes answered by maaartinus 10 votes

Greatest hits from previous weeks:

Reading data from Excel sheet with ExcelDataReader

Objective: I want to import an Excel file, and read the rows of certain columns. For this, I use ExcelDataReader. I've implemented a low-level class called ExcelData which uses the ExcelDataReader ...

c# exception-handling io excel

asked by user3488442 6 votes answered by BenVlodgi 4 votes

Minesweeper Code

I created some code for Minesweeper but I need help going over it. I would like if someone could go over it and point out anything (repeating code, code being called multiple times when not needed, ...

java game minesweeper

asked by Exikle 4 votes answered by MrLore 6 votes

Can you answer these?

Merging multiple JSON files using Python

I have multiple (1000+) JSON files each of which contain a JSON array. I want to merge all these files into a single file. I came up with the following, which reads each of those files and creates a ...

python json file io

asked by Alagappan Ramu 3 votes

Button presses counter

I'm moving on to graphics, picking Pyglet and Cocos2D. This is my first program in Python with GUI. Introducing: Two distinct high definition button sprites Satisfying high quality button pressing ...

python beginner game python3 user-interface

asked by Xis88 5 votes

Neural Network Simulator with OpenMP

I wrote a simple neural network simulator (the biophysical kind) from scratch, and was hoping to get some feedback on how I can speed things up, or any C++ / compilation best practices that I can ...

c++ multithreading openmp

asked by ejang 2 votes