Flatten an object

flattenObject.js

const _ = require('lodash');

function flattenObj(obj, prefix) {
	prefix || (prefix = '');

	return Object.keys(obj)
		.reduce((flat, key) => (
			_.isObject(obj[key]) ?
				// Recursively flatten objects
				Object.assign(flat, flattenObj(obj[key], `${prefix}${key}.`)) :
				// Assign flattened values to a prefixed key
				Object.assign(flat, {
					[prefix + key]: obj[key]
				})
		), {});
}

module.exports = flattenObj;

flattenObject.ts

import * as _ from 'lodash';

function flattenObj(obj:any, prefix:string = ''):any {
  return Object.keys(obj)
    .reduce((flat, key) => (
      _.isObject(obj[key]) ?
        // Recursively flatten objects
        Object.assign(flat, flattenObj(obj[key], `${prefix}${key}.`)) :
        // Assign flattened values to a prefixed key
        Object.assign(flat, {
          [prefix + key]: obj[key]
        })
    ), {});
}