Different? Different you say? Just how different, exactly?
When comparing collections of objects, we find it possible to say exactly how many fewer objects one collection has than the other.
This you could call "finding the difference," or perhaps, more succinctly, "differencing." Really it's just comparing, but a kind of comparing wherein you end up with a little bit more information at the end. Instead of just "bigger, smaller, or the same," after comparing in this way you'll also know the exact DIFFERENCE between the two collections.
Негізгі бет The Fourth Big Idea: HOW DIFFERENT? ("Differencing," or Quantifying Difference)
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