Bill Baxter: > The rationale for .empty is that .length could be an O(n) operation > for some containers, but .empty should always be O(1). So, the > negation of .length is not a general replacement for .empty.
I didn't know isEmpty() or opBool() must be O(1). But I remember Andrei (and maybe other people too) strongly refuse my len() function that sometimes returns length (in O(1)) and sometimes iterates all items of a lazy iterable and returns their number in O(n) or more. So you may be wrong. Bye, bearophile
