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by too-soon-ago
2847 days ago
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The meanings are the same. In one case you're sorting a set of items which are all unique, whereas in the other there are some duplicates under the sorting key. If you sort by just the suit of the cards, you have clusters that are of the same suit. It's only in the very-precise world of programming that a set versus a set of sets makes much of a difference. |
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