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intersect!

intersect!(s1, s2)

Intersects sets s1 and s2 and overwrites the set s1 with the result. If needed, s1 will be expanded to the size of s2.

Examples

1. Intersect two arrays:

   julia> arr1 = [1, 2, 3, 4, 5];
   julia> arr2 = [4, 5, 6, 7, 8];
   julia> intersect!(arr1, arr2)
   2-element Array{Int64,1}:
   4
   5

   This example finds the common elements between arr1 and arr2 and overwrites arr1 with the result.

2. Intersect two sets:

   julia> set1 = Set([1, 2, 3, 4, 5]);
   julia> set2 = Set([4, 5, 6, 7, 8]);
   julia> intersect!(set1, set2)
   Set{Int64} with 2 elements:
   4
   5

   It performs intersection on two sets set1 and set2 and modifies set1 with the common elements.

3. Intersect arrays and sets:

   julia> arr = [1, 2, 3, 4, 5];
   julia> set = Set([4, 5, 6, 7, 8]);
   julia> intersect!(arr, set)
   2-element Array{Int64,1}:
   4
   5

   It finds the intersection between an array arr and a set set and updates arr with the common elements.

Common mistake example:

julia> arr = [1, 2, 3, 4, 5];
julia> intersect!(arr, [4, 5, 6, 7, 8])
ERROR: MethodError: no method matching intersect!(::Array{Int64,1}, ::Array{Int64,1})

In this example, the second argument provided is an array instead of a set. The intersect! function expects both arguments to be of type Set. Make sure to pass sets when using intersect!.

See Also

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