Javascript Beginner's series - Objects

reflection_and_deletion.js

//Reflection
//"typeof" does it for you
console.log(typeof flight.number);      // 'number'
console.log(typeof flight.arrival);     // 'object'
console.log(typeof flight.manifest);    // 'undefined'
console.log(typeof flight.toString);    // 'function'
console.log(typeof flight.constructor); // 'function'

/*
If you would like to access an object property and want the value of the child not the parent's, you can use "hasOwnProperty"
*/
console.log(flight.hasOwnProperty('number'));         // true
console.log(flight.hasOwnProperty('constructor'));    // false


//How to delete an object property:
delete flight.arrival
console.log(flight);