I want to answer one simple question… What is FFI in Ruby? FFI stands for “Foreign Function Interface”. It’s a way to use functions defined in other programming languages. Ruby’s FFI module gives you access to external libraries & code that you wouldn’t have otherwise. We often use this to work with C code. Examples … Read more
Rails link_to method! One of the most common helper methods you’ll use in all your Rails applications. But how does it work? If you came here to learn about link_to & the different options you can use with it then you’re in the right place! First… What does link_to do? Well, this whole website thing … Read more
Creating a temporary file gives you an empty file with a random name inside your O.S. (Operating System) temporary folder. This file gets deleted automatically. How can you do this in Ruby? Like this: require ‘tempfile’ Tempfile.create { |f| f << “abc\n” } Where f is your file & << writes to it. This is … Read more
What is Cron? Cron is a job scheduling system available in Linux & MacOS operating systems. It can be used to run any program at any given time. This includes Ruby code! If there is a specific recurring task that you would like to run automatically every day, every week or even every hour, then … Read more
What is Redis? Redis is a kind of in-memory database that has different kinds of data structures you can use. Like: Key / value storage Lists Sets It has nothing to do with your typical SQL database, like Postgres. Uses for Redis include: Caching Leaderboards Counting visitors Fast autocomplete suggestions Keeping track of active user … Read more