text: // const _ = require('./lodash')
  const my = require('./my_lodash')
  const t = require('./require_test')
  
  // console.log(_.add(1,2,3))
  // t.hello()
  // console.log(_.isNaN())
  // console.log(my.add(1,2,3))
  // console.log(_.add(1,2))
  console.log(my.baseDifference())