หาวัตถุอยู่ในตารางคู่ลำดับรายการรีบโดยกุญแจ

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ยังไงเพื่อให้รายการของค่าเฉพาะกุญแจอยู่ในตารางคู่ลำดับวัตถุอยู่ในรี

import Foundation

let strings = [
    "one",
    "two",
    "three"
]

let ints = strings.map { (string) -> Int in
    return string.count
}

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