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Welcome to the five-part series of blog posts about SOLID Principles. In each part I will describe and analyze one of these principles. In the last part, expect summary of the entire series containing a few tips and thoughts.
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In today's TIL we say hi to ActiveRecord's dependent hooks, explore how they relate to callbacks, and what impact could it have on the development of an app.
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What is transcoding This process can be extremely useful in applications for streaming music or video files. Transcoding simply means converting a file from one digital format to another. A media file usually consists of a number of pieces - called tracks - which are packed into a container along with metadata information. Each of the tracks is encoded into a specific format. Transcoding is done by extracting those tracks from the container, then decoding, filtering, and encoding again each of them one after another, and finally packing them into a new container.
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Have you ever spent a lot of time setting up your project after system update? Or maybe your operating system is too old and libraries contained within it don't allow you to use newest programming libraries? Finding exact versions, manually resolving dependencies and compilation from source sounds familiar to you? Maybe your projects require different versions of database or you need different database settings for different projects.
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Every Rails developer knows that loading assets can be really time-consuming. Here are some useful tips on how to speed it up.
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While we're still waiting for Ruby 3.0 (with the promised performance improvements) a lot of Ruby developers try to use available alternatives for the known ecosystem. I gave a try to Crystal language some time ago and I must admit - that's great. Here are a few reasons why you should do the same. Which advantages of Crystal language might be loved by Rubyists?
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In today's TIL... Ruby on Rails! When you're developing the multi-language application at some point you may encounter the need to always include language code in your URLs. 
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Welcome to brand new series of content where we will share short tips and pieces of knowledge. This time Ruby on Rails! Recently I was working on separating gettext translations in our project into separate domains. It's very useful in cases when some strings should be translated differently in different contexts. I will explain shortly how to use multiple domains for Gettext translations in your Rails app. Enjoy!
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Automated e-mails is a big business nowadays, and quite a  topic to discuss. Usually when developing a rails application a simple SMTP provider like Sendgrid or Mandrill with an addition of Sidekiq and Cron is more than enough. Nevertheless, you may encounter clients who already used some tools and have a large mailing list in, ActiveCampaign being one of them. Here are a few tips about ActiveCampaign and Rails implementation with the use of CloudFlare.
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Flags are everywhere. These boolean fields are so common that I cannot imagine a mature application that wouldn’t use them in multiple models – from the ubiquitous “admin” column on a User model to the “cancelled” flag on a Reservation model to various temporary flags that determine who should have access to some new features being tested. I’ve worked with apps that had very extensive models with many columns, out of which even 6 or 7 of were just booleans of various kinds.
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