algorithm(leetcode) Reverse Integer

reverseInteger.go

func reverse(x int) int {

    sign := x >= 0 // sign
    abVal := math.Abs(float64(x)) //절대값
    t := strconv.Itoa(int(abVal)) // toString
    return reverseString(t, sign) // reverse string and get int value
}

func reverseString(s string, sign bool) int {

    runes := []rune(s)
    for i, j := 0, len(runes)-1; i < j; i, j = i+1, j-1 {
        runes[i], runes[j] = runes[j], runes[i]
    }

    reversedString := string(runes) //get reverse string by rune type

    i, _ := strconv.Atoi(reversedString) //to int

    if i > math.MaxInt32 { //32bit overflow check
        return 0
    }

    if !sign { //sign check
        return -i
    } else {
        return i
    }

}