Prompt 3

prompt3.js

const input = {
  a: {
    b: {
      c: 12,
      d: "Hello World",
    },
    e: [1, 2, 3],
  },
  hi: "there",
  checks: {
    null: null,
    boolean: true,
    boolean2: false,
    function: function () {},
  },
};

// Helper function to determine which fields to leave alone
const canGoDeeper = (obj) =>
  typeof obj === "object" && !Array.isArray(obj) && obj != null;

// main recursive function
const flatten = (obj, prefix = "", res = {}) => {
  return Object.entries(obj).reduce((r, [key, val]) => {
    const k = `${prefix}${key}`;

    if (canGoDeeper(val)) {
      flatten(val, `${k}/`, r);
    } else {
      res[k] = val;
    }
    return r;
  }, res);
};

console.log(flatten(input));