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
What is a data structure? A data structure is a specific way to organize & access data. Examples include: Arrays Binary trees Hashes Different data structures excel at different tasks. For example, hashes are great if you’re looking to store data that looks like a dictionary (word & definition), or a phone book (person name … Read more
You can use the select method in Ruby to filter an array of objects. For example, you can find all the even numbers in a list. Without select that looks like this: even_numbers = [] [1,2,3,4,5,6].each do |n| if n.even? even_numbers
What’s rendering in Rails? Rendering is the ultimate goal of your Ruby on Rails application. You render a view, usually .html.erb files, which contain a mix of HMTL & Ruby code. A view is what the user sees. It’s the result of all the work your Rails app has to do. Views combine logic, data … Read more