Ruby - Job scheduling lock with Redis
In a Rails app, sometimes you need to execute a long-running job and have to run it in the background. You might run into some special re...
Concurrency in Ruby: Thread and Fiber
The content of this article is my last tech sharing with my team at https://pixta.vn/.
Lambda Calculus: Represent in Clojure and Elixir
Lambda calculus is the main idea behind functional programming, a complete model for computation. There are a lot of documents and course...
Clojure - a whirlwind tour
Clojure is a functional, dynamic language, a dialect of Lisp that runs on the JVM. Because it is a functional language, it has some aspec...
Active Storage - some techniques
Requirements
Ruby - DIY accessor methods
Ruby does not allow instance variables to be accessed outside of methods for that object.
Rails helpers tips for writing better view
The dom_id helper takes a string or any object as an argument that can be converted to a dom_id. And it helps us convert an object into a...
Azure App Service notes
Prerequisite: On the Azure dashboard, we must create a new app service and resource group that the app service belongs to. For simplicity...
Export large file in Rails with Sidekiq
In some systems, you'll have to do something very slow. Maybe you need to export a large dataset to a CSV file, or need to generate a tho...
Elixir Note - Concurrency
For example, we have a simple module to fetch the price of a given ticker symbol (or stock symbol) from API and parse the results.
Elixir Note - Recursion
Due to immutability, loops in Elixir are written differently from imperative languages. For example, loops commonly look like:
Ruby under Scanner
Recently, I have read the CS paper that compares Ruby and Java.