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Close your blocks the minute you open them.
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Check the line number.
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Read the error the message. Like all of it. Seriously.
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Adding a debug before and after.
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Confirm all variable values.
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Re-read the code that generated the error.
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Read the entire test, description, describe, it block.
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Reconfirm what the purpose of the unit of code that the error is in.
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GO FOR A WALK
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Confirm the type of objects.
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Confirm the level of nested data structures.
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Tell a story, out loud, about what you're trying to do.
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Avoid the rabbit hole, don't yak shave, remember, constantly, exactly what you're trying to do.
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One error at a time.
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Run every change you're doing.
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Copy the method to Pry and try to run it in isolation.
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Confirm your return values.
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Confirm the values of your arguments.
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Ask someone.
Ruby Debugging Checklist by Flatiron School is licensed under a Creative Commons Attribution-NonCommercial-ShareAlike 4.0 International License.
