Simple namespace tool

namespace.coffee

# Namespace tool for accessing our namespace           
#                                                      
# Usage:                                               
#   bar = NS "PWB.foo.bar"                             
#                                    
# Idea from Javascript Patterns by Stoyan Stefanov
#                  
window.NS = (nsString) ->                              
  parent = window                                      
  for ns in nsString.split "."                         
    # Create new namespace if it is missing            
    parent = parent[ns] ?= {}                          
  parent # return the asked namespace