Ruby On Rails

Tutorials

Ruby 2.5 introduces FrozenError class

Ruby 2.5 introduces FrozenError class Ruby 2.5 introduces FrozenError class which is a subclass of RuntimeError class. This change is introduced to differentiate exceptions raised from attempting to modify a frozen object from.

Finding a Ruby bug with GDB

Finding a Ruby bug with GDB Learn how to debug Ruby using GDB, and how we found an obscure Ruby bug that stops a process from exiting in (rare) situations.

You Can't Save Everyone: Some Exceptions Should Be Left Alone

You Can't Save Everyone: Some Exceptions Should Be Left Alone I take a look at a fun case of permissive error handling that causes a Rails controller to accidentally catch an exception from RSpec.

Introducing Fir, the Friendly, Interactive Ruby REPL | nasseri.io

Introducing Fir, the Friendly, Interactive Ruby REPL | nasseri.io I haven’t been posting here much because most of my free time has been spent working on a ruby REPL that I call Fir, which stands for friendly-interactive-ruby.

Reducing Memory Usage in Ruby

Reducing Memory Usage in Ruby I’ve been working on building a compacting garbage collector in Ruby for a while now, and one of the biggest hurdles for implementing a compacting GC is updating references. For example, if Object A points to Object B, but the compacting GC moves ...

Tutorial: Distributed Tracing in Ruby with OpenTracing

Tutorial: Distributed Tracing in Ruby with OpenTracing However, distributed tracing - which connects a transaction trace across microservices - is getting a lot easier. In this short tutorial, I'll show how to add distributed tracing to your Sinatra web apps via OpenTracing, a vendor-neutral tracing A...

A DSL for Field-level Rails Cache Invalidation

A DSL for Field-level Rails Cache Invalidation In modern web development, caching is a quick and powerful way to speed things up. When done right, caching can bring significant improvements to your application’s overall performance. When done wrong, it will most definitely end in disaster.

How do Ruby

How do Ruby There are probably some mistakes in this post (as research for this post I read parts of the code for 14 different profiling libraries and most of those I hadn’t looked at before today), please let me know what they are!.

Comparing Timestamps in Rails

Comparing Timestamps in Rails In most cases, this frees you up to write code without having to explicitly convert between types or even know which types you’re comparing. But eventually you might find yourself try to test the equality of two timestamps which should logically b...

Do not run Rails with pending migrations

Do not run Rails with pending migrations Database migrations are the tricky part of any deployment. They make zero-time deploys problematic. They requires special attention since they can break stuff. Some might choose to run migrations automatically,.

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