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Writing down the types isn't a necessary property of static type systems. In Haskell, F# or (OCa)ML, you almost never have to actually mention any types.

I do agree that Java-style types aren't of much value. That catches few errors at significant cost.




Catching logical errors is only one out of several things that static typing gives you.

Incidentally, right now this is a few positions above this posting: https://news.ycombinator.com/item?id=12350063

Better IDE support, a kind of self-documentation and increased performance come to mind. I know there are counter-examples for each of these points, but the general trend cannot be denied.


The cost of non-Java-style types is compile time :)




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