I recently started looking into CQRS when using Entity Framework and the impact it has had on my systems has been overwhelming. I implemented the following patterns described in these blog posts: Query implementation: https://www.cuttingedge.it/blogs/steven/pivot/entry.php?id=92 Command implem...

Previously I use to always navigate through the $parent $scopes in order to send or change data from one Controller into/in another. I then created my own ScopeFactory as a way to storing each Controllers $scope and then getting those scopes from other Controllers. Have not experienced any prob...

package irproject; import java.io.*; import java.util.*; import java.util.concurrent.ConcurrentNavigableMap; import java.lang.*; import org.mapdb.*; import org.tartarus.snowball.ext.englishStemmer; public class inverted { HashMap<String,ArrayList<HashMap<String, Integer>>> idx = new HashMap<...

I am a self-taught programmer. I decided to learn design patterns by reading about them, and then coming up with their implementation in PHP. I know that learning would be virtually impossible without code review. I will be grateful if you could review my implementation of the Memento design pat...

The objective is to select which function is used to represent a type as a string for output on ostreams. The code here allows to explicitely choose a function, or to fallback on a java style Object::toString() method if it exists, because I'm using 3rd-party classes that follow that convention....

Please tell me if this is the wrong place to put this; it says I am asking a question but I am not, I just want my code reviewed. This program is a random password generator. It asks the user how many chars they want their password to be and how many passwords it should generate. I used the rand(...

The open source project I work on uses Antlr4 pretty heavily, but I don't know much about it. I thought I would use April's Community Challenge as an opportunity to learn something about grammars, lexers, and parsers. Without further adieu, below is my very simple calculator using the visitor pat...

I am learning C++ and I decided to implement a Directed and UnDirected graph. (I haven't learned how to do inheritance yet, so they are distinct classes.) I have not handled any error cases (i.e. trying to remove a vertex that doesn't exist.) I am interested in any comments/criticisms of my app...

The Cardshifter team has been working at "translating" a very complex Java class into JavaScript, to make it more accessible to somebody who would want to fork the game and make their own modification, which is an objective that's been close to our hearts since the very beginning (for the game to...

I am using play framework with scala and here is a scenario on which i would like to have your opinion. Lets say i have 2 custom exceptions that i can throw, they are EmailTaken and AuthFail. What i need to do here is whenever any of these 2 exceptions happen, i need to return a json with 3 keys ...

The Go Playground was boring so I decided to make a small application that throws me into the language. It basically queries the chatroom every second for new messages and displays them in the output pane (minus the bots their messages). It's all new to me so any insight is welcome. One thing I'...

I implemented the A* algorithm for pathfinding for a game of mine. The game uses hex rooms which are connected to each other by an int[] in the room class. Are there any pointers you can give me on my code? public class Pathfinding { /// <summary> /// Finds a path from one ro...

I have some Python code that copies a table from a website using Selenium, but as I haven't used Selenium much, I have that irksome feeling in the back of my mind that there must be a better way. It's also quite a bit slower than I would like. Here's the relevant code: # ...Navigate to proper pa...

I have a Ruby script that runs through a number of loops before finishing. Each time it finished one of the 9 loops, I'm putting a message on the screen with the time elapsed since the last loop finished. Here's the relevant code I'm using (minus the loops themselves) current = Time.now #Loop ...

I want a homegrown version of C++11's std::thread. My motivation is to avoid manual memory management of the arguments passed to the thread function. I'm restricted to C++98. I want better type safety than what's available in the POSIX and Win32 thread APIs. Two notes: I can't think of a way t...

Wanting to know if the code I have in this hangman game is correct for reading code from the hangman.txt file. I think the code is wrong for some reason. I compiled the code and I did not get any syntax errors, but think something is wrong with it though. The program is supposed to read the wor...