No, this is valid in languages with nullable types:
String s = null;
But this is not legal in languages without them:
String s = None;
In those languages, in order to have a value of None, it must be of type Option<String> (or whatever the syntax is), and in order to get a value of type String, you must assert its presence.
This is a fundamental difference with many ramifications. It really isn't just "the same but with better compile support".
String s = null;
But this is not legal in languages without them:
String s = None;
In those languages, in order to have a value of None, it must be of type Option<String> (or whatever the syntax is), and in order to get a value of type String, you must assert its presence.
This is a fundamental difference with many ramifications. It really isn't just "the same but with better compile support".