Object Methods & 'this'

hasOwnProperty

• Object.hasOwnProperty('name-of-key');
• Allows you to check an object for a specific key
• Returns true/false

Example:

var obj = {
  kittens: 'aww';
};
obj.hasOwnProperty('kittens'); // true

Object.keys()

• Object.keys(nameOfObject);
• Returns an array of every key that an Object has

Example:

var obj = {
  kittens: 'aww',
  puppies: 'adorable'
};
Object.keys(obj); // ['kittens', 'puppies']

'this'

• 'this' allows us to reference a base object
• Think of this as being able to jump up a root level in an object
• Further reading: http://javascriptissexy.com/understand-javascripts-this-with-clarity-and-master-it/