let ar = [Bool](count: 5, repeatedValue: false)
let nums = [Int](count: 5, repeatedValue: 0)
let ar = [Bool](count: 5, repeatedValue: false)
let nums = [Int](count: 5, repeatedValue: 0)
本文标题：swift创建一个固定大小，并且其值是统一的数组
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