Best Ruby resources

From time to time I feel like a web crawler. So here's all the resources I've found, by categories.

Today it's Ruby. Here we go...

API: Guides and tutorials: Interactive tutorials: Screencasts: Quizzes: Podcasts: Online courses: Talks: Tools and libs: Articles: REPLs:

Popular posts from this blog

Turbocharge HTTP requests in Ruby

Image
The problem The slowest part in many applications is I/O, especially network I/O. We spend a lot of trying to make sure we reduce the number of calls and cache results of API calls to 3rd party services and resources. Imagine we want to get data from Rick and Morty API . In this article, we are going to speed up subsequent requests to this API by almost 4x times . The solution And yet there's a trick that even very senior developers and popular API library/clients forget about that can shave off precious time of your network calls built right into HTTP. Establishing an HTTP connection is very costly, especially if it uses TLS . This is a fixed price added to your HTTP calls that can be avoided by using keep-alive - a mechanism built into HTTP. According to Wiki : HTTP keep-alive, or HTTP connection reuse, is the idea of using a single TCP connection to send and receive multiple HTTP requests/responses, as opposed to opening a new connection...
Read more

HTTP server in Ruby 3 - Fibers & Ractors

Image
This is part #2. Head over to part #1 to learn about HTTP in Ruby. Motivation Historically Ruby's been lacking in the concurrency department. Ruby has "native" threads (prior to 1.9 there were only "green"), which means there can be multiple threads controlled by an OS, but only 1 thread can be executed at a time, this is managed via Global Interpreter Lock (GIL). However, native calls and I/O calls can be executed in parallel. During an I/O call, a thread gives up control and waits for a signal that the I/O has finished. This means I/O heavy applications can benefit from multiple threads. In this article we are going to explore different concurrency modes for our HTTP server: Single-threaded Multi-threaded Fibers Ractors Single-threaded Let's start simple and see how a single threaded HTTP server could look like ( full code ): def start socket = TCPServer.new(HOST, PORT) sock...
Read more

Migration locks for TypeORM

Image
Schema migrations is a must-have functionality for any DB framework. TypeORM provides decent utilities for dealing with migrations, however having a decade of experience in Ruby on Rails I got really spoiled and take some features for granted. One of these features is locking a database while a migration going on so 2 processes running concurrently don't step on each other's toes. This is also important when you run migrations in Kubernetes before launching your app. I was really surprised to find out that this basic feature is not supported , so decided to implement it on my own. Implementation // typeormMigrationUtils.ts import { Connection, createConnection } from 'typeorm' import config from '../ormconfig' import CRC32 from 'crc-32' const MIGRATOR_SALT = 2053462845 async function withAdvisoryLock( connection: Connection, callback: () => Promise<void> ): Promise<boolean> { // generate a unique lock...
Read more