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kotlinlang

hey guys, how can i make a GET endpoint for something like `/book/1` or `/book/2`, or `/book/N` for any N number?
I am using Javalin

edit: figured it out:
 ```
get("/books/:id") { ctx -&gt;
  ctx.param("id")!!.toInt()
}
```

Couple of things here.. you want to match only on numbers - currently the implementation will (probably) blow up with a 500 (server error) if you send a non-numeric, whereas you want a 4xx error (client error). 

yeah, I noticed after i made a typo! Thanks for the heads-up