[kiitos]

I see it as unambiguously more clear, because it makes explicit what the machine will be doing when executing the code. Whether map/filter copy values, or mutate in-place, or etc. etc. is non-obvious. I mean I'm not saying my way is the only way and I appreciate that other people have different perspectives but I just want to make it clear that "clear" in code isn't an objective measure, that's all.

[xmcqdpt2]

I agree that there are no objective measure. I guess it's just different expectations.

I would not say it's obvious what the machine is doing in the Go example though. For example it wasn't clear to me that append() mostly doesn't copy the full vector, but does a copy of the slice pointer. I had to look it up from a blog post, because the source for append() is gnarly

https://github.com/golang/go/blob/go1.16.7/src/cmd/compile/i...

[kiitos]

> For example it wasn't clear to me that append() mostly doesn't copy the full vector, but does a copy of the slice pointer.

Well I guess you do have to grok the language spec and semantics in order to understand how builtins like append behave, I'm not sure that's avoidable.