TypeScript 0.9 released with Generics and Enums

Microsoft has released version 0.9 of TypeScript, a typed superset of JavaScript.

Some of the new features include:

• Generics
  The long requested language feature has finally arrived:

  interface Holder<t> { obj: T; }
  

• Enums
  Enumerations have returned to TypeScript. Enums allow a typed way to work with finite collections of constant numeric values.

  enum Color { green, blue, yellow }
  

• Overloading on Constants
  Declare the return type of a function based on a constant parameter value.
• new compiler infrastructure, optimized for better scalability with large codebases

Fore more information, see the official announcement.