anchor.diff:    1. [Template](#template)
     1. [Metadata](#metadata)
     1. [Data Binding](#data-binding)
  +  1. [Directive](#directive)  
     1. [Service](#service)
  -  1. [Directive](#directive)
     1. [Dependency Injection](#dependency-injection)
   
     Learn these eight and we're on our way.
  
positive.code:   
    >**[Forms](forms.html)** - Support complex data entry scenarios with HTML-based validation and dirty checking.
    
    >**HTTP** - Communicate with a server to get data, save data, and invoke server-side actions with this Angular HTTP client.
    
    >**[Lifecycle Hooks](lifecycle-hooks.html)** - We can tap into key moments in the lifetime of a component, from its creation to its destruction, 
    by implementing the "Lifecycle Hook" interfaces.
  
negative.code:   1. [Template](#template)
    1. [Metadata](#metadata)
    1. [Data Binding](#data-binding)
    1. [Directive](#directive)
    1. [Service](#service)
    1. [Dependency Injection](#dependency-injection)
    
    That's a foundation for everything else in an Angular application
  