SOURCE

const times = function (...params) {
  let [s, ...opts] = params
    console.log(opts)
  for (var i = 0; i < opts.length; i++) {

  s *= opts[i];

  }
return s
}
let arr = [1,2,3,4]
console.log(times(...arr))
console.log(arr)
const e = arr.reduce((a,b) => {
   return a * b
},1)
console.log(e)