Avdi Grimm 5/8/2025

Announcing Ivar: Ruby’s Missing Instance Variable Typo Warnings

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The article announces Ivar, a new tool designed to catch typos in Ruby instance variable names by providing compile-time warnings. This addresses a common source of bugs in Ruby, where misspelled instance variables silently return nil instead of raising an error. The tool aims to improve code safety and developer productivity in Ruby projects.

Announcing Ivar: Ruby’s Missing Instance Variable Typo Warnings

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