题解 | #在字符串中找出连续最长的数字串#

Swift题解

• 遍历字符串，提取数字部分添加到数组
• 数组按照字符串长短生序排列
• 连接数组中长度为最后一个字符串长度的所有字符串及结果

while let s = readLine() {
    let chars = [Character](s)
    var i = 0
    var array = [String]()
    var sub = ""
    while i < chars.count {
        let char = chars[i]
        if char >= Character("0") && char <= Character("9") {
            sub.append(char)
        } else {
            if sub.count > 0 {
                array.append(sub)
                sub = ""
            }
        }
        i += 1
    }
    if sub.count > 0 {
        array.append(sub)
    }
    array.sort { s1, s2 in
        return s1.count < s2.count
    }
    if array.count > 0 {
        let result = array.filter{ $0.count == array.last?.count }.joined()
        print("\(result),\(array.last?.count ?? 0)")
    }
}