例如，在每 3 个字符后拆分 “helloworld” ，那么理想情况下它应该返回一个 [“hel”,”low”,”orl”,”d”] 数组 

    1. func Chunks(s string, chunkSize int) []string {
    2.     if len(s) == 0 {
    3.         return nil
    4.     }
    5.     if chunkSize >= len(s) {
    6.         return []string{s}
    7.     }
    8.     var chunks []string = make([]string, 0, (len(s)-1)/chunkSize+1)
    9.     currentLen := 0
    10.     currentStart := 0
    11.     for i := range s {
    12.         if currentLen == chunkSize {
    13.             chunks = append(chunks, s[currentStart:i])
    14.             currentLen = 0
    15.             currentStart = i
    16.         }
    17.         currentLen++
    18.     }
    19.     chunks = append(chunks, s[currentStart:])
    20.     return chunks
    21. }

    例如将 mac地址 8810893093C0 转换为 88:10:89:30:93:C0

    1. mac :="8810893093C0 "
    2. mac = strings.Join(Chunks(mac, 2), ":")

    原文 https://www.imooc.com/wenda/detail/635169