[Solved] You want to find elements that are in setA but not in setB, and then... Which Swift code correctly does this?let setA: Set = [1, 2, 3, 4] let setB: Set = [3, 4, 5, 6] let setC: Set = [4, 5, 6, 7] | Swift

Swift - Collections

You want to find elements that are in setA but not in setB, and then add elements from setC that are also in setB. Which Swift code correctly does this?

let setA: Set = [1, 2, 3, 4]
let setB: Set = [3, 4, 5, 6]
let setC: Set = [4, 5, 6, 7]

Alet result = setA.subtracting(setB).union(setC.intersection(setB))

Blet result = setA.intersection(setB).union(setC.subtracting(setB))

Clet result = setA.union(setB).subtracting(setC)

Dlet result = setA.symmetricDifference(setB).union(setC)

Step-by-Step Solution

Solution:

Step 1: Find elements in setA but not in setB
Use setA.subtracting(setB) to get elements only in setA.
Step 2: Find elements in setC that are also in setB
Use setC.intersection(setB) to get common elements.
Step 3: Combine both results
Use union() to combine these two sets.
Final Answer:
let result = setA.subtracting(setB).union(setC.intersection(setB)) -> Option A
Quick Check:
Subtract then union with intersection [OK]

Quick Trick: Combine subtracting() and intersection() with union() [OK]

Common Mistakes:

Mixing intersection and subtracting order
Using union before subtracting
Confusing which sets to intersect

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More Swift Quizzes

You want to find elements that are in setA but not in setB, and then add elements from setC that are also in setB. Which Swift code correctly does this?

Step 1: Find elements in setA but not in setB

Step 2: Find elements in setC that are also in setB

Step 3: Combine both results

Final Answer:

Quick Check:

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