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most frequent element in array swift

Difficult Dunlin answered on December 21, 2021 Popularity 3/10 Helpfulness 5/10

answer most frequent element in array swift

most frequent element in array swift

Comment

func mostFrequent(array: [Int]) -> (value: Int, count: Int)? {
    var counts = [Int: Int]()

    array.forEach { counts[$0] = (counts[$0] ?? 0) + 1 }

    if let (value, count) = counts.max(by: {$0.1 < $1.1}) {
        return (value, count)
    }

    // array was empty
    return nil
}

if let result = mostFrequent(array: [1, 3, 2, 1, 1, 4, 5]) {
    print("\(result.value) occurs \(result.count) times")    
}

Popularity 3/10 Helpfulness 5/10 Language swift

Source: stackoverflow.com

Tags: element swift

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