Rename { List, Dict, Set }.length to count

[Skinney]

List.length gives sounds like a getter, giving the impression that it is a constant time operation, when it's actual linear time. Renaming that function to count gives a better impression of what the function actually does.

The same applies to Dict and Set. Array.length, on the other hand, is a getter and constant time operation and should keep its name.

[process-bot]

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[process-bot]

Thanks for the issue! Make sure it satisfies this checklist. My human colleagues will appreciate it!

Here is what to expect next, and if anyone wants to comment, keep these things in mind.

[evancz]

I don't know. It seems like a fine idea, but I'm not convinced it is better than just adding O(n) to the docs on things. Overall, do not want to track requests in issues though.

[evancz]

I don't know. It seems like a fine idea, but I'm not convinced it is better than just adding O(n) to the docs on things. Overall, do not want to track requests in issues though.