Created
March 11, 2019 19:32
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Just a function to format float64 to money in Golang :)
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| package main | |
| import ( | |
| "fmt" | |
| "math" | |
| "strings" | |
| ) | |
| func main() { | |
| var money float64 = 6922850.56 | |
| fmt.Println(fmtMoney(money, 2)) | |
| money = 0 | |
| fmt.Println(fmtMoney(money, 2)) | |
| money = 1 | |
| fmt.Println(fmtMoney(money, 2)) | |
| money = 18 | |
| fmt.Println(fmtMoney(money, 4)) | |
| money = 18.5641862 | |
| fmt.Println(fmtMoney(money, 6)) | |
| money = 123 | |
| fmt.Println(fmtMoney(money, 0)) | |
| money = -123 | |
| fmt.Println(fmtMoney(money, 1)) | |
| money = 123.75 | |
| fmt.Println(fmtMoney(money, 2)) | |
| money = 3123.75 | |
| fmt.Println(fmtMoney(money, 2)) | |
| money = -3123.75 | |
| fmt.Println(fmtMoney(money, 6)) | |
| money = 48621 | |
| fmt.Println(fmtMoney(money, 2)) | |
| money = -48621.99 | |
| fmt.Println(fmtMoney(money, 4)) | |
| money = 100000 | |
| fmt.Println(fmtMoney(money, 2)) | |
| money = 109850.346 | |
| fmt.Println(fmtMoney(money, 2)) | |
| money = 1098500 | |
| fmt.Println(fmtMoney(money, 4)) | |
| money = 999999999.99 | |
| fmt.Println(fmtMoney(money, 2)) | |
| money = 0 | |
| fmt.Println(fmtMoney(money, 0)) | |
| } | |
| func fmtMoney(v float64, d uint) string { | |
| var sign, decimals string | |
| if v < 0 { | |
| sign = "-" | |
| v = math.Abs(v) | |
| } | |
| places := fmt.Sprintf("%d", d) | |
| tmp := fmt.Sprintf("%."+places+"f", v) | |
| splited := strings.Split(tmp, ".") | |
| if len(splited) > 1 { | |
| decimals = splited[1] | |
| } else { | |
| decimals = "" | |
| } | |
| integers := splited[0] | |
| var retval string | |
| for i := len(integers); i > 0; i -= 3 { | |
| if i-3 <= 0 { | |
| retval = integers[0:i] + retval | |
| break | |
| } | |
| retval = "," + integers[i-3:i] + retval | |
| } | |
| retval = sign + retval | |
| if len(decimals) > 0 { | |
| retval += "." + decimals | |
| } | |
| return retval | |
| } |
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https://play.golang.com/p/0TfWmTC2a7j