> TL;DR. Don’t use Rails concerns. IntroductionIf you are an experienced Rails developer, you won’t need explanations about what a concern is. For those who are new to the framework, here is a short explanation: The Concern is a tool provided by the ActiveSupport lib for including modules in classes, creating mixins. module Emailable include ActiveSupport::Concern def deliver(email) # send email h
Tokio, an asynchronous runtime for Rust, is probably the most widely used one while there are several runtime implementations. Many OSS in Rust, such as web framework applications (rocket, warp, actix, etc), are built on Tokio. With Tokio, it's easy to implement network server applications. However, typical code that you often find in guide books or such scales poorly on multiple CPUs. I'll explai
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