[Zababa]

You could make the same arguments when you're working with slices in Go. Take append(slice, element). Does it return a slice with the element appended to it, or does it modify the slice in-place?. For some things, you have to look at the docs, that's how it is. Usually languages have conventions around that. In JS, map, filter and reduce always return a fresh array and leave the initial array untouched.

[masklinn]

> You could make the same arguments when you're working with slices in Go. Take append(slice, element). Does it return a slice with the element appended to it, or does it modify the slice in-place?

A funny trick question as it pretty much does both.

Also I'll take "functional trickery" over needing a page called Slice Tricks so you can find out how to delete an item any day of the week.