I’m curious; how have people liked the

it

feature of Kotlin? Does it cause problems/confusions?

rattrayalex: i love it, so do people i've asked to review. most people don't understand it initially, but it only takes a few seconds to explain

I like it too. But there are few gotchas in it, if you using nested

.let

blocks then you should be careful to use it. For that case we are using unwrap library: https://github.com/importre/kotlin-unwrap

it

is great if you use it properly. Don't use it in nested or multi-line lambdas. It should only be used when the definition of

it

is immediately and unambiguously clear

Is

it

equivalent to

_

in Scala?

No,

_

is equivalent to

_

in Scala 😆 . If you have a lambda with one parameter, you can choose not to define the param name and it's implicitly named

it

I thought you can do functional references in kotlin like in java with

map(SomeClass::transformThing)

that sytax obviates the need for a known symbol in a lambda

You can, but what if you want to do

myObject.map { it.foo?.bar }

, or something more complex?

So just like in Scala, where you’d wrote:

strings.map( _.length )

oh wow, didn't realize

_

meant so many things in Scala https://stackoverflow.com/a/8001065/3204764