Converts an integer to an array of digits.

Use strconv.Itoa() to convert the given number to a string, make() and len() to create an appropriate slice.
Use range in combination with strings.Split() to iterate over the digits, converting them to int using strconv.Atoi().

代码实现

import (
    "strconv"
    "strings"
)

func Digits(n int) []int {
    s := strconv.Itoa(n)
    d := make([]int, len(s))
    for i, l := range strings.Split(s, "") {
        d[i], _ = strconv.Atoi(l)
    }
    return d
}

使用样例

Digits(123) // [1 2 3]