JavaScript type checking

solarSystem.js

const _ = require('underscore')

const solarSystem = (...args) => {
  let planet, asteroids, satellite, spaceJunk, isFake
  args.forEach(arg => {
    if(_.isArray(arg)) return asteroids = arg
    if(_.isObject(arg)) return planet = arg
    if(_.isString(arg)) return satellite = arg
    if(_.isNumber(arg)) return spaceJunk = arg
    if(_.isBoolean(arg)) return isFake = arg
  })
  //proceed to code knowing your arguments are what you expect them to be...
}