Do you prefer ```abstract class A abstract fun doSomething ` kotlinlang #codereview

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Title

Eugen Martynov

05/28/2020, 9:25 AM

Do you prefer

abstract class A {
  abstract fun doSomething()
}

with

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

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

with

A() {...}

araqnid

05/28/2020, 9:46 AM

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)

☝️ 1

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)

➕ 3

Matteo Mirk

05/28/2020, 9:50 AM

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

Eugen Martynov

05/28/2020, 10:37 AM

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

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