Kotlin allows you to use any Java APIs, including annotations

Thanks for the confirmation @yole

Pasted image at 2016_05_19 03_35 PM.png

I think Obsidian works really well

frosty

Captura de pantalla 2016-05-19 a las 2.42.49 p.m..png

@Inject

is used like

@Inject lateinit var something : Sometype

notice the lateinit keyword used in kotlin

Aw, please teach people constructor injection.

Works without any kinks and jives so well with the immutable-by-default style in kotlin.

But doesn’t work everywhere.

Wtf

And a little tricky to implement in Kotlin.

Theres a big discussion about constructor injection and this type. When you need to inject many clases, constructors tend to get huge, and inheritance becomes spagetti since you need to call the parents with many arguments

I'd argue that's by design.

it's also impossible to do when you don't control object creation

e.g. android fragments

That’s exactly what I’m talking about.

inner class

’s keyword

inner

, what’s the meaning of this keyword?

I put this class

in

its

outter class

, meaning it is a

inner

class

why this keyword meaning?

it’s the opposite of

static

in Java

if you put a class inside another class, it’s called “nested class”

hm,

inner

, this keyword’s meaning seems not like his name

it’s exactly the same as in Java: https://docs.oracle.com/javase/tutorial/java/javaOO/nested.html

@yole: after trying Kotlin some time ago and then coding in Java for couple of months and now getting back to Kotlin again i have to say that IDE support could be better. I don't have any specific issue except that sometimes IDE doesn't tell me that I have an error in my code and it won't compile. It may be connected with kapt actually but I and my coworkers have experienced this many times. And all I can do in this case is to manually go file after file and find code that is for example misspelled or something. In general I don't feel as comfortable and safe as when I code in Java. But I see that it's getting better and better so I hope we'll get there :)

convenience____let_____w_multiple_checks_.kt

hi folks, is there some kind of „convenient“ check for multiple nullable var’s?

like let, but with more checks at once?

see snippet