Nulls

[Brian Goetz]

> What I'm taking away from Doug's
> message is that there are *no* lambdas that can deal with nulls.

There's nothing intrinsically null-hostile about lambdas; lambdas are 
basically methods, you can pass null into them and they can return null. 
  However, many naively-written lambdas (e.g., .map(e -> e.toString()) 
will throw when null is presented to them.

Again, this is not a problem when people expect nulls in their 
collection.  When people don't expect nulls -- which is most of the time 
-- the reality is they'll get some unexpected NPE somewhere, and then 
they can put

   .filter(o != null)

in their pipeline.