useful Javascript decorators

 Decorators help simplify code by replacing the noise of common patterns with
 declarative annotations.
 .
 Decko establishes 3 standard decorators that are immediately recognizable, so
 you can avoid creating decorators in your own codebase:
 .
   * @bind: make the value of this constant within a method
   * @debounce: throttle calls to a method
   * @memoize: cache return values based on arguments