To me, this is: 1. Off topic 2. Inappropriate given this is documented and can be found on Kotlin and Java doc, and can also be found in IDE. 3. Abusive given this new user is asking many questions, and it doesn't seem he does some research before. (The last meta conversation was about him.) https://kotlinlang.slack.com/archives/C3SGXARS6/p1555596842110900?thread_ts=1555596842.110900&cid=C3SGXARS6

To be fair, it's documented not that thoroughly: https://kotlinlang.org/api/latest/jvm/stdlib/kotlin.text/-string-builder/ensure-capacity.html

Ooops! Would be nice to fix, I think it's very obvious to people having used it in Java, or trusting and understanding from the name what the function does, but for beginners starting with Kotlin…

I've filed https://youtrack.jetbrains.com/issue/KT-31118 in order not to forget it.

Thanks, and sorry for the false alarm. Now that I see that, I understand the question, and I think this is also available in Kotlin/Native.

I feel like this guy only did some ASM/C before but no OOP, hence the weird questions while he seem to know things in low level domains