Yep, he originally threw out all names that appeared on both lists, while he's now arbitrarily assigning them to the winners' set. Not sure about the reasoning behind the change, but there it is. The quoted line computed new winning and losing sets that excluded all commonalities.
I actually also really liked that line, it helped flesh the article out to be an impromptu tutorial on using sets in python (which it still is, to a certain extent). I remember reading that sets overloaded some sensible operators a while back, but I really appreciated this reminder.
In other words, very nice of you to highlight it in a comment, as new readers wouldn't have seen it otherwise (as it turns out).
Most times when I read Norvig's Python I get the same feeling as when a tough riddle answer is given, except with Norvig you don't wonder whether anyone actually arrives at the answer the first time they hear it, you know he did.
Comments
I love Norvig's Python posts. He really gets the spirit of the language and has fun with it.
Yes, I love expressions as this one:
Was that in an earlier version? I can't find that in the article now.
Yep, he originally threw out all names that appeared on both lists, while he's now arbitrarily assigning them to the winners' set. Not sure about the reasoning behind the change, but there it is. The quoted line computed new winning and losing sets that excluded all commonalities.
I actually also really liked that line, it helped flesh the article out to be an impromptu tutorial on using sets in python (which it still is, to a certain extent). I remember reading that sets overloaded some sensible operators a while back, but I really appreciated this reminder.
In other words, very nice of you to highlight it in a comment, as new readers wouldn't have seen it otherwise (as it turns out).
Most times when I read Norvig's Python I get the same feeling as when a tough riddle answer is given, except with Norvig you don't wonder whether anyone actually arrives at the answer the first time they hear it, you know he did.