a basic reducer doodle

doodle4231.js

const baseArr = [[1, 2], [{ foo: 'bar' }]]

const reducer1 = (keepRefs) => (acc, val, i) => {
  if (keepRefs) {
    acc[i] = val
    return acc
  }

  try {
    acc[i] = JSON.parse(JSON.stringify(val))
  } catch (error) {
    acc[i] = val
  }
  return acc
}

const resWithRefs = baseArr.reduce(reducer1(true), {})
const resWithoutRefs = baseArr.reduce(reducer1(false), {})

console.log("🚀 ~ file: derp.js ~ line 19 ~ resWithoutRefs", {
  resWithRefs, resWithoutRefs,
  refTest: resWithRefs[1] === baseArr[1],
  noRefTest: resWithoutRefs[1] === baseArr[1]
})