The use of "this"

[magician11]

I’m going through some lessons at codecademy.com

function add(firstName, lastName, email, phoneNumber) {
    contacts[contacts.length] = {
        this.firstName: firstName,
        this.lastName: lastName,
        this.email: email,
        this.phoneNumber: phoneNumber
    };
}

For this code.. why exactly is “this” not required?

versus for a constructor..

function Human(name, age) {

this.name = name;
this.age = age;
}

[whatsoever]

When you use a constructor function, you invoke it with the ‘new’ operator:

function Person (firstName, lastName) { 


this.firstName = firstName; 
this.lastName = lastName; 
}

var johnSmith = new Person('John', 'Smith'); 

Which puts the ‘johnSmith’ object in the context of ‘this’ in the constructor function.

The ‘add’ function takes several parameters, adds a new object to the contacts array and sets the properties of the object using object literal notation which does not require ‘this’ when setting properties.

[Author]

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