restArgs & spread clarification

restargs-spread.js

const stringify = (a, b) => 
  toString(a + b);
  
const init = (a, b) => // anti pattern
  stringify(...[a, b]) // stringify(a, b)

const init = (...args) =>
  stringify(...args)
  
const init = (a, b) =>
  stringify(...arguments) // Not optimal in babel

const init = (...args) => { // put my args into an array
  const [a, b] = args; // likely to want this
  return stringify(...args) // explode my array into comma list
}