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📜  数组中字符串的索引 swift 代码示例

📅  最后修改于: 2022-03-11 15:00:58.579000             🧑  作者: Mango

代码示例1
let arr = ["a","b","c","a"]

let indexOfA = arr.firstIndex(of: "a") // 0
let indexOfB = arr.lastIndex(of: "a") // 3