namespace.js

function namespace(root, path, value){
  path.split('.').reduce(function(object, key, i, namespace) {
    if(i < namespace.length) {
      return object[key] =  (object.hasOwnProperty(key) ? object[key] : {})
    }
    return object[key] = (!value ? object[key] : value)
  }, root)
}