Get object values by string sequence

object_value_by_string_seq.js

// using string sequence, get object key

//'red.big.apple', {red: { big: { apple: 'apple'}}} => 'apple'

// 'red.fast.fancy.car', { red: { slow: 'something'}} => undefined
const get = (keySequence, nestedObject) => {
  const seqArr = keySequence.split(".");
  let result = nestedObject;
  while (seqArr.length > 0) {
    let key = seqArr.shift(); // seqArr now has length-1
    if (typeof result[key] !== "undefined") {
      result = result[key];
    } else {
      return;
    }
  }

  return result;
};

console.log(get("red.big.apple", { red: { big: { apple: "apple" } } }));