Ruby 2 Keyword Arguments
With Ruby 2.0 we now have first-class support for keyword arguments in our method parameters. ("First class" means it is a fundamental part of the...
TypeScript Crash Course
1/ Everything is a Type The foundation of TypeScript is that everything — absolutely every variable, constant, or object — is a type. You will always be...
The Magic of Enums in Rails
Ruby on Rails has special under-the-hood magic that will patch four methods onto your models for each enum value you specify. That means if you...
The .github/CODEOWNERS File
• Can be used to specify notifications for certain people or teams. (---) (---) • Can be used with a path that will notify the...
Ensure with Explicit Return
Consider the following method. Assume that the call to thing.method_that_possibly_raises! might raise an app exception we will call SomeAppException? def some_method thing.method_that_possibly_raises! ensure return thing end What we...
Modern Chrome $ Jquery Replacement
We know that we don't have jQuery installed because if we open Dev Tools and type jquery on the console, we see this. IMPORTANT: Modern...
Ruby Essential Testing Tools
Here is the "test tooling" that you need to be a successful Ruby developer. [subpages] Rspec Factory Bot SimpleCov Reverse_coverage Reverse coverage is a tool...
Use Git Clean Remove Changes and New Directories
Doesn't actually clean yet, just tells you what would be cleaned: git clean -n For real, delete any files not committed to your repository git...
Shell Scripting – set -euo pipefail Failsafe
Shell scripts don't actually fail automatically. If one line returns a non-zero (failure) exit code, that code simply falls through to the next line, but...