Equivalent to .length()


What is the Kotlin equivalent to Java’s .length()? Also, how do you use Kotlin’s size and length functions?


Its the same thing, but it might suggest using a propert accessor so arr.length or arr.size


The form may not be the best place to ask these small questions if you’re wanting quick responses. I’d recommend reading the reference: http://kotlinlang.org/docs/reference/

Or maybe going through the Kotlin Koans using the web IDE: https://try.kotlinlang.org/#/Kotlin%20Koans/Introduction/Hello,%20world!/Task.kt


I would say count is the kotlin-alternative.
It works on objects that have the size and length property.


Count and Length / size is something different. IMHO count can actually count the elements (e.g. on an iterable iterate through everything), but length / size can work with stored values…


You can see size/length as an implementation of count.
So you’re correct.
But I don’t think it’s very different (although the implementation may be other than O(1)).
Most of the time count just refers to size or length, depending on which method the class has