green zodiac
Hello everyone
I was wondering if there are any good libraries for handling currency in Go. I found https://github.com/Rhymond/go-money and it mostly works however oddly enough I have a specific value of 4533.40 which gets displayed as $4,533.39. Seems like a mistake in implementation. Just looking for a good robust lib.
mystic zodiac
That's odd.
How do you initialise "the money"?
spark viper
Did you initialize from float?
thick remnant
spark viper
You shouldn't use decimal for currency
thick remnant
Why?
spark viper
They don't do well with rounding
You should use integer for the smallest piece of currency, like number of pennies
thick remnant
You should use integer for the smallest piece of currency, like number of pennie...
It gets out of hand when dealing with crypto currencies that have a lot of decimal places
spark viper
Exactly why you shouldn't use decimals
thick remnant
They don't do well with rounding
I’m not sure I understand what you mean
thick remnant
Exactly why you shouldn't use decimals
My point was that decimal is better for such currencies than using ints
spark viper
For example for Bitcoin you don't store it as a float/decimal. You store it as number of the lowest piece which is called like Satoshi or something
thick remnant
Decimal is not floating point
thick remnant
For example for Bitcoin you don't store it as a float/decimal. You store it as n...
Good luck doing that with ethereum which has 18 decimal places
How are you gonna represent 1000 ethereums?
You would need int128 numbers
spark viper
Maybe ive misunderstood that repo
thick remnant
Good luck doing that with ethereum which has 18 decimal places
How are you gonn...
It is doable
But using decimal is pretty good for these use cases (currencies)
green zodiac
Did you initialize from float?
Yeah I did. It keeps rounding down. Super weird.
stark current
I misread this as concurrency haha
mystic zodiac
Yeah I did. It keeps rounding down. Super weird.
Try to initialize it with an int.
indigo rune
You shouldn't use decimal for currency
Wrong
Decimal is good
Float is bad
Float is IEEE754 which loses precision. Decimal (depending on the impl) does not
The one linked above is perfectly good for money
indigo rune
Oh sorry I didn't see you changed your mind 🐢
brave sand
@indigo rune when you say decimal is good, which go data type are you referring to? Go doesn't have a decimal data type.
mystic zodiac
<@206794847581896705> when you say decimal is good, which go data type are you r...
It has.
Go std has big.🐀 but the interface is not perfect.
https://pkg.go.dev/math/big#Rat
But there are several alternative implementations to std
brave sand
@mystic zodiac thanks. I wasn't aware of that package. I want to clarify, do you mean decimal number or decimal point number?