title: how to convert array of integers into hex string and vice versa in javascript
body: <p>I have array of 32 bit integers in javascript.
  How to convert it into the Hex string 
  and again build the same 32 bit integer array from that Hex string when required?</p>
  
  <p>hexString = yourNumber.toString(16);
  can be used to convert number to hex
  but when array of numbers is converted into Hex string (it will be continuous or separated by some character) then how do I get back array of numbers from that string? </p>