setdiff!

setdiff!(s, iterable)

Remove each element of `iterable` from set `s` in-place.

Examples

1. Remove elements from a set in-place:

``````julia> set1 = Set([1, 2, 3, 4, 5]);
julia> setdiff!(set1, [3, 4, 6]);
julia> set1
Set([1, 2, 5])``````

This example removes the elements `[3, 4, 6]` from the set `set1` in-place.

2. Modify a set of strings:

``````julia> set2 = Set(["apple", "banana", "orange", "grape"]);
julia> setdiff!(set2, ["banana", "grape"]);
julia> set2
Set(["apple", "orange"])``````

It removes the elements `["banana", "grape"]` from the set `set2` in-place.

3. Handle edge cases with an empty set:
``````julia> set3 = Set([1, 2, 3]);
julia> setdiff!(set3, []);
julia> set3
Set([1, 2, 3])``````

It handles the case where the iterable is empty and doesn't modify the set.

Common mistake example:

``````julia> set4 = Set([1, 2, 3]);
julia> setdiff!(set4, [4, 5, 6]);
julia> set4
Set([1, 2, 3])``````

In this example, the iterable contains elements that are not present in the set. Since `setdiff!` only removes elements that exist in both the set and the iterable, the set remains unchanged. Make sure the iterable contains elements that are present in the set for successful removal.

complement, complement!, intersect, intersect!, issubset, selectperm, selectperm!, Set, setdiff, setdiff!, symdiff, union, union!,

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