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/**
 * @param {Date} from 
 * @param {Date} to 
 */
function dateDiff(from, to) {
  from = new Date(from);
  to = new Date(to);
  var diffMs = to - from; // milliseconds between from & to
  var diffDays = Math.floor(diffMs / 86400000); // days
  var diffHrs = Math.floor((diffMs % 86400000) / 3600000); // hours

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/**
 * @param {Date} from
 * @param {Date} to
 */
getDiffInHrs = (from, to) => Math.floor(Math.abs((new Date(from) - new Date(to)) / 36e5));

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/**
 * @param {any string} str
 */
const camelCase = (str) => str.replace(/(^|\s)\S/g, (t) => t.toUpperCase());

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/**
  * @param {string} url
  */
function isURLValid(url) {
    return new RegExp(
      "^(https?:\\/\\/)?" + // protocol
        "((([a-z\\d]([a-z\\d-]*[a-z\\d])*)\\.?)+[a-z]{2,}|" + // domain name
        "((\\d{1,3}\\.){3}\\d{1,3}))" + // OR ip (v4) address
        "(\\:\\d+)?(\\/[-a-z\\d%_.~+]*)*" + // port and path
        "(\\?[;&a-z\\d%_.~+=-]*)?" + // query string

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/**
 * @param {string} str 
 * @param {number} len - default is 50 
 */
const shortenString = (str = "", len = 50) => { if(str.length > len) return str.substr(0, len); return str;  }

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/**
 * @param {Array of objects} obj 
 * @param {String} key 
 * @param {Number} ord : 1 = Ascending(Default), -1 = Descending
 */
const sortObjectByKey = (obj = [], key = "", ord = 1) => 
      obj.sort((a, b) => (a[key] > b[key] ? 1 * 0 + ord : b[key] > a[key] ? 1 * 0 - ord : 0));

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/**
 * @param {number} length - default is 13 
 */
function generateRandomString(length = 13) {
  var res = "";
  var chars = "ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789";
  for (var i = 0; i < length; i++) res += chars.charAt(Math.floor(Math.random() * chars.length));
  return res;
}

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/**
 * @param {Array} arr
 */
const getUniqueArray = (arr = []) => {
  const uArr = [];
  arr.forEach((a) => {
    if (uArr.indexOf(a) === -1) uArr.push(a);
  });
  return uArr;
};

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/**
 * @param {Object} o
 */
const objectToQueryParams = (o = {}) =>
  Object.entries(o)
    .map((p) => `${encodeURIComponent(p[0])}=${encodeURIComponent(p[1])}`)
    .join("&");

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/**
 * @param {Object} obj
 * @param {String} keys : keys seperated by comma
 * Example : console.log( hasOwnProperty({'a':1, 'b':2, 'c':3}, "a,d") );
 */
const hasOwnProperty = (obj, keys) => {
  if(Object.entries(obj).length == 0 || keys.length == 0) return false;
  else return keys.split(",").map((k) => {
    if(k != "" && !Object.hasOwnProperty.call(obj, k)) return `${k} not found`;
  }).filter(a=> typeof a == 'string')[0] || "All key(s) found";