Object caching

object-caching.js

var employees = [
    {
        "firstName": "John",
        "lastName": "Doe"
    },
    {
        "firstName": "Anna",
        "lastName": "Smith"
    },
    {
        "firstName": "Peter",
        "lastName": "Jones"
    }
];

/*This is not a preferred way*/

for (var x in employees){
    console.log( employees[x].firstName, employees[x].lastName);
}


/*This is a preferred way */

var currentEmployee;

for ( var x in employees ){
    currentEmployee = employees[x];
    console.log( currentEmployee.firstName, currentEmployee.lastName);
}