https://avdi.codes/announcing-ivar-rubys-missing-instance-variable-typo-warnings/
Announcing Ivar: Ruby’s Missing Instance Variable Typo Warnings – avdi.codes
Ivar is a Ruby gem that automatically checks for typos in instance variables.
instance variableannouncingivarmissingtypo
https://webglossary.info/terms/instance-variable/
Instance variable · WebGlossary.info · Uncover Your Unknowns in Web Development
instance variableweb developmentinfouncover
https://martinfowler.com/bliki/ClassInstanceVariable.html
Class Instance Variable
instance variableclass
https://rosettacode.org/wiki/Add_a_variable_to_a_class_instance_at_runtime
Add a variable to a class instance at runtime - Rosetta Code
Mar 21, 2026 - Demonstrate how to dynamically add variables to an object (a class instance) at runtime. This is useful when the methods/variables of an instance are based on...
rosetta codeaddvariable