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Why on official microsoft site is implemented dictionary with lock instead of concurrentdictionary https://docs.microsoft.com/en-us/aspnet/signalr/overview/guide-to-the-api/mapping-users-to-connections public class ConnectionMapping<T> { private readonly Dictionary<T, HashSet<string>> _connections = new Dictionary<T, HashSet<string>>();Read more

I want to implement reactive write to file. In low level, it uses NIO and Futures. After reading this section I created this code but maybe there’s more clean or less code solution. Thanks. public class LocalImageService implements IImageService { private String imageDir = “/tmp”; @Override public Mono<String> storeImage(@NonNull InputStream imageStream, @NonNull String ext) {Read more

I’ve made two attempts at this problem, I’m wondering how I can improve each of them and which approach is better. 1st attempt ///Orders parsed numbers by correctProvider -> unknownProvider -> incorrectProvider. If the users location can be idenitified we then order these subsets so the numbers for the users location are on top. privateRead more

The usual way is to implement socket server to handle concurrent requests by creating new thread for each request. Instead of this approach i tried to create a server using consumer-producer design, as follows. Main thread //holds socket instances ConcurrentLinkedQueue<Socket> queue = new ConcurrentLinkedQueue<>(); //create producer thread Thread producer = new Thread(new RequestProducer(queue)); //create consumerRead more

The usual way is to implement socket server to handle concurrent requests by creating new thread for each request. Instead of this approach i tried to create a server using consumer-producer design, as follows. Main thread //holds socket instances ConcurrentLinkedQueue<Socket> queue = new ConcurrentLinkedQueue<>(); //create producer thread Thread producer = new Thread(new RequestProducer(queue)); //create consumerRead more

Hi I would like some feedback on my code. I am currently building a payments solution in a serverless lambda project. This what I came up with(very basic code atm). // “interface implementation” export default class Stripe { constructor() { this.stripe = new Stripe() } async charge(data) { try { const result = await this.stripe.chargeCustomerByToken(data);Read more

I have this PHP code. I wrote it for a webpage it uses parameters. Only one set of parameters can be set at any one time. If both are set its invalid, if None are set its invalid How would be the best way to write it, looks too long to me and i FeelRead more

Have a look at this Mersenne Twister random-number generator function that I’ve written based on what I found on SO. As I am a beginner and don’t understand half of the stuff below, I would very much appreciate if you guided me a little on my journey to improving this random number generator. I don’tRead more

I make a php script to check value before update. This script is working fine. But, I wonder how to simplify this. If there are hundred of column to be checked then it’s make hundred of php lines. public function edit_project_master(){ $ no_pro = ‘PRJ-2017-501’; // $ na_pro = $ this->input->post(‘na_pro’); //value for edit $Read more

I wrote a feature for my website today. Let’s say you have two volunteer shifts. One takes place from 9AM to 1PM. The other takes place from 11AM to 3PM. Now let’s say you are a volunteer picking shifts on my website. I want the website to throw an error if there are more thanRead more