Avoid Null Checks by Replacing Finders With Tellers
The person method accepts an id for a person and a block. If the person is found the block is called with the person. Otherwise it isn’t. Elegant, eh? And, there are no nulls.
Lots of luck doing this in a language without blocks or lambdas. I think that when the history of computing is finally written, one of the chapters will be about how much insanity thrived in the era before blocks were considered mainstream.
