alt Hacker Newsnever using nulls is liberating. this is syntactic sugar for dealing with nulls. definitely welcome though, and definitely will be abused (which cant be done when nulls are actually banished)
never using nulls is liberating. this is syntactic sugar for dealing with nulls. definitely welcome though, and definitely will be abused (which cant be done when nulls are actually banished)
When you don't, you'd likely have an Maybe<string> for a username that would be a "string?" in C#. It's the same thing (more or less). For your optional type you still need some form of pattern matching to figure out whether you have it or not.
You can't banish the "absence of value" from any programming language. That wouldn't be a useful language. You can stop confusing "a string but perhaps not" as a single type "string" as C# did in the past though.