Hey
The stackoverflow answer is fine but the libs provided may not be as
node friendly as
https://github.com/iriscouch/bigdecimal.js
Peace
Anton
On Friday, July 13, 2012 4:09:29 PM UTC+1, Jeff Barczewski wrote:
>
> If you want to get around the rounding errors with javascript then you
> need to work in cents (or even hundreths of a cent for more accuracy).
>
> So basically multiply your currency like dollars by 100 to get it into
> cents, do your calculations, then finally, divide by 100 or simply sprintf
> to display in dollars
>
> By using non-fractional numbers, the javascript IEEE 754 floating point
> operations are exact.
>
>
> Alternatively you could try a decimal or BigNumber implementation in
> javascript, a couple are mentioned in http://stackoverflow.com/a/3439981
>
> Jeff
>
>
> On Friday, 13 July 2012 05:29:59 UTC-5, Micheil Smith wrote:
>>
>> Hi Eysenck,
>>
>> You may not want to use Node.js (or any javascript vm) for this, due to
>> the inherent issues
>> javascript has dealing with fractional numbers, for instance, take the
>> classic expression:
>>
>> "0.3 - 0.2 != 0.1"
>>
>> However, as this is a financial application, you'd probably be storing
>> currency as an integer,
>> not as a float, so you wouldn't have this issue. (ie, store all currency
>> in the lowest fractional,
>> so $19.35 is stored as 1935).
>>
>> As for choosing your web framework, you'll definitely want to make sure
>> that the framework
>> is either battle tested or built to a good standard (ie, it'd suck if you
>> had mass-insertion issues
>> in your DB, or if your app crashed and you lost all state of accounts.)
>>
>>
>> So, the TL;DR; of this is: You could probably use node.js + express for
>> this, but, you'll want to
>> make sure you know node.js first, before jumping down this chasm. You may
>> just be better off
>> using the stack of technologies you already know.
>>
>> Kind Regards,
>> Micheil Smith
>> --
>> BrandedCode.com
>>
>>
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