data.json

{"_id":"60d90843f2de503b38cedd21","asks":[{"price":"34335.41","volume":"2.945558"},{"price":"34336.91","volume":"1.957166"},{"price":"34336.92","volume":"0.198337"},{"price":"34337.14","volume":"0.58016"},{"price":"34337.18","volume":"0.062053"},{"price":"34340.25","volume":"0.089595"},{"price":"34340.62","volume":"0.093975"},{"price":"34341.99","volume":"0.224002"},{"price":"34342","volume":"0.64"},{"price":"34342.83","volume":"0.187001"}],"bids":[{"price":"34335.4","volume":"0.487535"},{"price":"34333.82","volume":"0.040469"},{"price":"34332.59","volume":"0.004369"},{"price":"34329.53","volume":"0.000295"},{"price":"34326.78","volume":"0.251112"},{"price":"34326.77","volume":"0.4"},{"price":"34325.02","volume":"0.317457"},{"price":"34325.01","volume":"0.19687"},{"price":"34325","volume":"0.001"},{"price":"34323.03","volume":"0.307214"}],"seq":553600,"time":"2021-06-27T16: 22: 42.984-07: 00"}

isEqual.js

function getObjectType(obj) {
	return Object.prototype.toString.call(obj)
}
function isObjArray(obj) {
	return getObjectType(obj) === '[object Array]'
}
function isObjFunction(obj) {
	return obj === '[object Function]'
}
function getLength(obj) {
	return isObjArray(obj) ? obj.length : Object.keys(obj).length
}
function isObject(obj) {
	return ['[object Array]', '[object Object]'].indexOf(obj) < 0
}
function compare(item1, item2) {
	const itemType = getObjectType(item1)
	if (isObject(itemType)) {
		if (itemType !== getObjectType(item2)) return false
		if (isObjFunction(itemType) && item1.toString() !== item2.toString()) return false
		return true
	}
	if (!isEqual(item1, item2)) return false
	return true
}
function isEqual(value, other) {
	const type = getObjectType(value)
	const valueLen = getLength(value)
	if (type !== getObjectType(other) || isObject(type) || valueLen !== getLength(other)) return false
	if (isObjArray(type)) {
		for (let i = 0; i < valueLen; i++) {
			if (!compare(value[i], other[i])) return false
		}
	}
	for (const key of Object.keys(value)) {
		if (!compare(value[key], other[key])) return false
	}
	return true
}

module.exports = isEqual

main.js

const data = require('./data.json');
const {highorderFn,loopFn} = require('./process');
const isEqual = require('./checkArrayEqual');


// Print the first entry of the first array for each of the functions.
// Could also print everything out instead.
console.log(highorderFn(data).sort()[0][0]);
console.log(loopFn(data).sort()[0][0]);


console.log("DO THEY MATCH: ", isEqual(highorderFn(data), loopFn(data)))

processData.js

function loopFn(response) {
	const dataArray = []
	for (let type in response) {
		if (['bids', 'asks'].includes(type)) {
			const typeArray = []
			for (let row of response[type]) {
				typeArray.push({ ...row, type })
			}
			dataArray.push(typeArray)
		}
	}
	return dataArray
}


const highorderFn = (response) => Object.keys(response).filter((key) => ['bids', 'asks'].includes(key)).map((type) => response[type].map((row) => ({ ...row, type })));


module.exports = {highorderFn, loopFn}