The following is my first try at this classical interview question. It is quiet different from the solutions Gayle Laakmann provides in her book, and in another question on stackoverflow, someone initially mentioned there are better ways to do it. ) I think my solution should run in O(n) time a...

This is class for fast and small footprint buffer made specially for network I/O. It is similar to so called circular buffers, but is not circular. #include <cstdint> #include <cstring> #include <cstdio> #include <unistd.h> // read namespace net{ template<size_t CAPACITY> class Conne...

Recently I started playing a bit with Slim and what is making me confused is a necessity of container and middlewares hard coding. As because I am a staunch supporter of a dynamic loading I decided to write a piece of code for middlewares that suits my preferences. Considering my programing skill...

I would like to use the following routine in my submission script for GAMESS calculations. I am not entirely sure if this is the optimum way to go. This function would need one of the messaging routines, message, to function properly, but I decided to put echo in front of it, since this is basic...

I am trying to pass some values from a list into an insert statement and thought it would be straightforrd enough but I find myself wasting far too much time on this: please could eomeone explain what's going wrong here? WORKS WITH HARDCODED LIST of values cursor=db.cursor() cursor.execute(" I...

I execute the following SQL statement to get back an data object into a variable. try { $getUser = $db->query('select * from user where user.user_id = '.$user_id); } catch (Exception $e) { echo $e->getMessage(); die(); } from this I print out the information on the page wher...

As an adjunct to From new Q to compiler in 30 seconds, I've created a Python script to automatically download the markdown from any question on Code Review and save it to a local file using Unix-style line endings. For instance, to fetch the markdown for this question, one could write: python f...

I created an application from 3 layers, DAL, BLL, and Representation layer in ASP.NET Web API. In DAL i have 4 Classes: - DatabaseContext.cs, UnitOfWork.cs, GenericRepository and UserInfo. In BLL i have a class called UserRepository that implemnet the IUserRepository interface. In the Represent...

As an introduction, I would like to have my inputs validated with the built-in validation HTML5 attributes, e.g. use pattern for text input. So this is my sample code that implements that. Is it considered best practice while handling event, to access event.target, which is the original DOM, and...

I've been writing code for a little while but I'm a little slapdash. I'd like to get better so I've been having a glance at best practices, other peoples code and reading a whole lot. I'd appreciate it if you could read through my code and make some suggestions and explain why. You'll find some o...

Role based security does not work for me well in a multitenant app, as I need to query DB to decide on permission allowance. Here the solution I came to. All implementations of this interface will be auto registered in IoC container (note covariance/contravariance support): public interface IRe...

So currently I have this basic little chat bot that can read commands and can timeout users if their message contains a banned word or phrase. I was wondering how I can improve on this bot to be able to !add "word" to the set of banned words and overall general flaw improvements. import string ...

So, yes, I know that "you shouldn't derive from std containers" but by now it's more of philosophical rule in my mind than a technical one. I've googled again for the one fundamental reason one should never-ever-ever-ever-do-that-ever-ever-ever-or-you-die but couldn't find it. So, if there's not...

I have created a NodeJS script that I will be using to export front-end configuration details from my Zabbix installation, which will then be sent to my secondary (backup) Zabbix installation to keep them in sync. The script works, but I find myself chaining promises in a really ugly way. Is the...

I am developing java program for web scraping. The code is too long and I can not publish it here and will ask my question using some class names. I have 4 classes. Class Main starts the whole application. Class Robot(extends Thread) has all the methods that Class Crawler1 is using .(Crawler1 ext...

I am faced with a design issue that has been discussed on SO several times, the most similar question being this one. Essentially, I want polymorphism for a CUDA kernel in the form of a "generic" kernel that can apply a "user-supplied" function to every element in an array. In C++, one could ac...

Trying to find the shortest route between two different cities. I've included what I have done below. I am not sure how to fix it and make it work properly. public static List<City> Cities = new List<City>(); public static List<City> ConnectionNodes = new List<City>(); public static st...

Trying to find the shortest path route between any two cities. Using a for loop to loop through the lists to find the paths. Any ideas how I can improve the for loop to make it work better and properly. originCity = GetUserInput("Pick the starting city: "); //e.g. Buenos Aires destCity ...

Here is the task Click me Could somebody point out, where am I making a mistake please? I am getting a really low score, but when I try it with my text file, it seems like it's working how it should work. using System; using System.Collections.Generic; using System.Linq; using System.Text; usin...

I am new to Erlang and functional programming. It very hard for me to catch up with it without objects and states. I would like to sum up all Fibonacci numbers that not exceeds 4,000,000. Actualy this code doesn't even compile. Could you please comment on my mistakes? -module(erlang_task). -aut...

I have made a simple static parser for a bigger program. This parser takes a string that has comma deliminators and I need to separate the strings in to a vector for handling in a different section of the code. I would like this to run as fast as possible so the rest of the program isn't tied up...

I've written a simple demo for Conway's Game Of Life for self-practice. How can I improve the code, especially the processLife() method which traverses and updates the next state of every element in the matrix. The complete code is down below; For those who's eyes are tired of looking code her...

I'm working on a program that generates a maximal geometric progression of at least 3 integers when given a number that the greatest value shouldn't exceed. My current code works, and it's quick(ish) with small numbers, but anything past 100 takes far longer than I'd like, as I need to calculate...

Write a program by using if-else statement, which can generate Grades for students depending on the Marks. Here under is the criterion for awarding Grade. • If Marks is equal to 50 → Grade is ‘A’ • If Marks is greater or equal to 40 and less than 50 → Grade is ‘B’ • If Marks is greater or e...

Hello everyone im making a connect4 game in c# and i am currently programming the checking wins into my project. i'm currently working on the horizontal wins and keeping it inside the grid array. I've managed to get the left edge inside the array when the token is dropped into the most left colum...

Hello everyone im making a connect4 game in c# and i am currently programming the checking wins into my project. i'm currently working on the horizontal wins and keeping it inside the grid array. I've managed to get the left edge inside the array when the token is dropped into the most left colum...

I've implemented a templated DBSCAN for general use. At the moment, it's going to be used on Android through the JNI. I used Wikipedia's pseudocode and a little bit of the DBSCAN paper for reference. It's pretty naive, so I'm wondering how I can speed it up, and what I can do to make it perform r...