Welcome to RUBY3.dev

It was the dawn of the third age of Ruby…

=> Hashrocket into the future every week and become a wiz at this delightful and powerful language.

Read our tidy little manifesto or explore the articles below.

“Ruby is simple in appearance, but is very complex inside, just like our human body.”

matz

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Latest Articles

Better OOP Through Lazily-Instantiated Memoized Dependencies

There are various schools of thought around how best to define dependencies in your object graph. Let’s learn about the one I prefer to use the majority of the time. It takes advantage of three techniques Ruby provides for us: variable-like method calls, lazy instantiation, and memoization.

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Static Typing in Ruby 3 Gives Me a Headache (But I Could Grow to Like It)

It kinda sorta works—with several asterisks. Hence the reason it took me so long to even write an article about Ruby 3 typing. I think I’m onboard with where this is all headed, but we have a ways to get there.

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Ractors: Multi-Core Parallel Processing Comes to Ruby 3

Historically, the only way you could truly achieve async parallelism in Ruby would be to fork multiple processes or schedule background jobs. Until now.

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Everything You Need to Know About Destructuring in Ruby 3

How improved pattern matching and rightward assignment make it possible to “destructure” hashes and arrays in Ruby 3.

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