Yeah ducks are the worst

# announcements

[sreich]

Yeah ducks are the worst

[vach]

duck lovers use JS 🙂 they just type stuff and hope that the duck knows how to kwack 😄

[mg6maciej]

I have a feeling you are mixing ducktyping with either dynamic typing or weak typing.

[mg6maciej]

Go is strongly, statically typed and has ducks.

[vach]

Oh i didn't know that go does that, nice

[mg6maciej]

I think Haskell too, but I might be wrong here. I never really used it.

[dh44t]

Scala does

[dh44t]

I like it

[dh44t]

also TypeScript

[mg6maciej]

Scala has ducktyping? Wow, didn't expect a language on JVM to have this.

[dh44t]

Structural typing

[mg6maciej]

Yeah, reading about it now.

[dh44t]

is heavy at runtime cost

[mg6maciej]

Looks like anonymous interface.

[dh44t]

and produce a lot of bytecode

[mg6maciej]

Yes, I would expect that on JVM to be of some cost.

[dh44t]

most scala styles discourage it

[dh44t]

but is useful for cheap and dirty (at code level) reflection tricks

[dh44t]

for example calling a method that you know is there but you have a higher type like Any

[dh44t]

you could cast it to an structural type

[dh44t]

and call the method

[trevjones]

I was just wishing the other day you could do a type alias of composite types. something similar to what you can do with generics. typealias AB = A & B Figured it implies the underlying system supports duck typing