const createCopy = (item) => { if (!item || typeof item !== 'object') return item const accumulator = Array.isArray(item) ? [] : {} return iterator(item, accumulator, createCopy) } const iterator = (iterable, accumulator, callback) => { for (let key in iterable) { // istanbul ignore next if (iterable.hasOwnProperty(key)) { accumulator[key] = callback(iterable[key]) } } return accumulator } module.exports = { createCopy, iterator }