You can use typed/racket with optional types, it’s kinda easy. | Hacker News

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		kuschku on Dec 20, 2014 \| parent \| context \| favorite \| on: ARMv7 vs. x86-64: Pathfinding benchmark of C++, D,... You can use typed/racket with optional types, it’s kinda easy.

klibertp on Dec 20, 2014 [–]

How? The docs say (http://docs.racket-lang.org/ts-guide/more.html#(part._when-a...) that you have to provide type annotations in certain cases.

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