Function setDifference

Returns a new set that contains all elements of the first set that are not in the second set.

Example

new Set([1, 2, 3, 4]);;
//=> Set {1, 2, 3, 4}
new Set([3, 4, 5, 6]);;
//=> Set {3, 4, 5, 6}
setDifference(new Set([1, 2, 3, 4]), new Set([3, 4, 5, 6]));;
//=> Set {1, 2}
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