Object_prototype_constructor_example1

Object_prototype_instance_example1

// Constructor function for myObj
function myObj(firstValue, secondValue, thirdValue, undefined) {
    this.firstKey = firstValue; // disabled due null
    this.secondKey = secondValue; // second parameter is enabled; all the rest are disabled in console output;
    this.thirdKey = thirdValue;  // disabled due null;
    this.nKey = undefined;  // disabled due undefined;
}

// Create a myObject; Object Instance name ::after keyword "new" must match name of the function constructor name defined above!
var userInput = new myObj("Index1userA", "JavaScript", "Index3userC", "Index4userD"); /* Basically, what User1 inputs inside parantheses
by changing one of the parameters of myObj object instance; */ /*
parameters inside paranthesis of instance object myObj matches parameters parallely defined inside constructor function parantheses. */

// Display Index2userB or anything else what would be overwritten inside Object Instance instead  of Index2UserB by UserB
console.log("My user name is " + userInput.secondKey);
// Console output: My user name is JavaScript