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var test = require('tape')

var nestedExampleObject = { head: 'cats', tail: { head: 'dogs', tail: { head: 'rabbit' } } }

// finds the deepest level of nestedThing function findBottomAnimal( nestedObject, headCollection ) { headCollection = headCollection || []

var animalHeads = nestedObject.head headCollection.push(animalHeads)

// look inside the nestedObject // if there's no tail inside the nestedObject, we're at the 'bottom' if(nestedObject.tail === undefined){ return headCollection }

// add the current head to the collection

// return the head at this level var result = findBottomAnimal(nestedObject.tail, headCollection) return result

// if we found a tail, we want to 'step inside' that tail, // and run 'findBottomAnimal' again on this // save the result of this 'deeper' findBottomAnimal // return this result }