Returns the integer current age from the D.O.B. string which is in format 'YYYY-MM-DD'

string_date_to_age.js

//dob is of format 'YYYY<separator>MM<separator>DD'
//eg, to find the age with DOB string 1969-08-02 we need to call the method getAge('1969-08-02','-')

function getAge(dob,separator){
  var arr_d = dob.split(separator); 
  var date_d = new Date(parseInt(arr_d[0]),parseInt(arr_d[1])-1,parseInt(arr_d[2]));//In javaScript month values are from 0-11. So January is 0.  
  var date_now = Date.now();
  var one_year=1000*60*60*24*365; //getting the millisecond in one year
  var str_age = ((date_now-date_d)/one_year).toString();
  return parseInt(str_age.split(".")[0]);
  
}