This is a set operation (set difference), not a list operation.
Sure it is a set operation. As is uniq, or even max. You could want to do the same operation to hashkeys, or to a CSV string. But the most common way that the set-difference problem shows up is as the set difference between two lists.

If not List::MoreUtils, I'm still surprised it isn't in one of the common modules.

throop

In reply to Re^3: Difference Quantity of two Arrays by throop
in thread Difference Quantity of two Arrays by ocs

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