[OT] Some neat ideas from the Kotlin language

[Nemanja Boric via Digitalmars-d]

On Friday, 19 February 2016 at 12:16:49 UTC, Jacob Carlborg wrote:
> I like the way it's used in Scala:
>
> val a = Option(value)
> val b = a.map(e => e /* do something with the unrapped 
> e).getOrElse(/* use a default value here */)
>
> The Option type in Scala acts like a zero or one element 
> collection. The Scala way can be implemented in D as well 
> without any language support.
>

IMHO, without language support looks really bad - `map` really 
sticks out here.

What Rust is doing:

```
let foo: Option<i32> = bar();

let new_stuff = match foo {
    Some(x) => x,
    None => 0
}
```

(or similar, I don't have compiler handy).