I need to know how to check where the variable is - if not defined - then where it is assigned. Via Pry or similar gem (or Ruby standard library, that is - if possible)
Ruby and Pry (or other debugging gem): How can I show the definition of a variable?
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I think this is the closest I can come up with right now to answer your question. Please check pry-moves
You could use it to debug the start-up of the execution of your program and use
watch variable(if you at least know the name of the variable) and look when it gets a value, there you would know in which step of the execution it is defined/declared.