Intro to Objects

• Objects are data structures that store data, and help track of that data by keys.
• Objects have properties and methods.
• typeof operator: return name of the data type
• Object-literal notation

var umbrella = {
  color: 'red',
  isOpen: false,
  open: function() {
    umbrella.isOpen = true;
  }
}

• Data retrieval
  • Bracket notation: umbrella['color']
  • Dot notation: umbrella.color
• Naming conventions
  • Don't wrap property names in quotes.
  • Special propery names can be put inside quotes. But they are not compatible with dot notations.
  • Don't use numbers as first character as property names.
  • Don't include space or - in property names.
  • Use camel case for multi-word property names.