Do you prefer ```abstract class A { abstract fun doSomething() }``` with ```object: A() { overri...

# codereview

[Eugen Martynov]

Do you prefer

abstract class A {
  abstract fun doSomething()
}

with

object: A() {
  override fun doSomething(){}
}

or

class A(private val doSomething: () -> Unit)

with

A() {...}

?

[araqnid]

Usually the first, I don’t remember ever using a constructor with a trailing {…} block (took me a few seconds to parse what was going on)

[araqnid]

although if A is an interface with a single method, can’t it now be satisfied by a lambda? (I know that used to be just for Java SAM interfaces, but I thought it had been extended to Kotlin ones too)

[Matteo Mirk]

If understand correctly you’re choosing between two styles to implement the Strategy pattern?

[Eugen Martynov]

it is scroll listener class for pagination, it calculates when next page should be loaded and call the abstract function