perfectStep := ",1,3,5,4,2," 结果不变保存从小到大

你可以将前面所述的代码稍作修改，将最终的排序结果保存回 `perfectStep` 变量中，示例如下：

import (
    "fmt"
    "sort"
    "strconv"
    "strings"
)

func main() {
    perfectStep := ",1,3,5,4,2,"
    strSlice := strings.Split(perfectStep, ",")
    intSlice := make([]int, 0, len(strSlice)-1)
    for _, str := range strSlice {
        if str != "" {
            num, err := strconv.Atoi(str)
            if err == nil {
                intSlice = append(intSlice, num)
            }
        }
    }
    sort.Ints(intSlice)
    intSliceStr := strings.Trim(strings.Join(strings.Fields(fmt.Sprint(intSlice)), ","), "[]")
    perfectStep = "," + intSliceStr + ","
    fmt.Println(perfectStep)
}

在排序后的整数类型切片转换成字符串类型的过程中，我们将其存储在了 `intSliceStr` 变量中，最后再将其保存回 `perfectStep` 变量中。输出结果为：`",1,2,3,4,5,"`。