queryDB.js

/**
 * query movie  main character form movie name 
 * @constructor
 * @param {string} name
 * @param {function} success(characterArray) - success  callback funtion return all record character
 * @param {function} err(string) - error  callback funtion return error string
 */
function queryDB(name,success,err){
 
  var intern=  {
     name : "intern",
    character :[
    { name : "Ben" ,actor: "Robert De Niro", age:"70"},
    { name : "Jules" ,actor: "Anne Hathaway", age:"22"},
    { name : "Paige" ,actor: "JoJo Kushner", age:"5"},
  ]};
  var  martian={
    name : "martian",
    character : [ { name : "Matt Damon" ,actor: "Mark Watney", age:"32"} ]
  };
   var db = [intern, martian];
   for(var idx in db) if(db[idx].name ===name){
     setTimeout(function success() {
      success(db[idx]);
}, 3000 );
     return;
   }
   setTimeout(function err() {
       err("movie not found"); 
}, 3000 );
 
  return;
    
}