rl404/go-malscraper

package utils

import (
    "math"
)

// GetPercent to calculate percentage result with adjustable number of digit after comma.
// With default 2 digits after comma.
func GetPercent(top interface{}, bottom interface{}, digit ...int) float64 {
    var newTop, newBottom float64

    switch v := top.(type) {
    case int:
        newTop = float64(v)
    case float64:
        newTop = v
    }

    switch v := bottom.(type) {
    case int:
        newBottom = float64(v)
    case float64:
        newBottom = v
    }

    if newBottom == 0.0 {
        return 0.0
    }

    result := (newTop / newBottom) * 100.00

    afterComma := 2.0
    if len(digit) > 0 && digit[0] >= 0 {
        afterComma = float64(digit[0])
    }

    return math.Round(result*math.Pow(10, afterComma)) / math.Pow(10, afterComma)
}