ExtendedParameterHandling.js

///// Array /////
//ES5
var nameArrayEs5 = ["ramazan","duygu"];
var newArrayEs5 = ["enis","kübra"].concat(nameArrayEs5);
console.log(newArrayEs5);
//output
[ 'enis', 'kübra', 'ramazan', 'duygu' ]

//ES6-spread
var nameArray = ["ramazan","duygu"];
var newArray= [...nameArray, "enis","kübra"];
console.log(newArray);
//output
[ 'ramazan', 'duygu', 'enis', 'kübra' ]

///// Object /////
//ES5
var addressInfo = {
  city: "istanbul",
  district:"bahçelievler"
};
var userInfo = {
  name: "ramazan",
  surname: "kanbur"
};

for (var prop in userInfo) { addressInfo[prop] = userInfo[prop]; }
console.log(addressInfo);
  
//ES6-spread
var addressInfoEs6 = {
  city: "istanbul",
  district:"bahçelievler"
};
var userInfoEs6 = {
  name: "ramazan",
  surname: "kanbur"
};
var mergedObject ={...addressInfoEs6,...userInfoEs6}; 
console.log(mergedObject);