No offence but perhaps you bought the wrong book? Eloquent Ruby is about style and design patterns, it's almost about the philosophy of Ruby code, best practises, aesthetics and the author's experiences.

Books like that are fundamentally about taste and style and technique; they can't really be "wrong". You might disagree with the author and think you have a superior approach but to say that randomly googling the topic led you to a "better" explanation tells me that perhaps you were looking at the wrong book in the first place.