Hacker News Reader

Comment by qwerty456127 | Hacker News Reader

What about BigDecimal?

I wonder the same. The readme says:

"The / operator also work as expected with whole numbers. However, since these are BigInts and not BigDecimals, this operation will round towards 0, which is to say, it will not return any fractional digits."

What BigDecimal are they referring to? I don't find any tc39 big decimals, only third party libraries

There isn’t a BigDecimal proposal anywhere, the authors are just making it clear that their proposal is limited to integers.

> There isn’t a BigDecimal proposal anywhere

Why? I find it so weird there still is no BigDecimal in JavaScript.

I actually didn’t look hard enough: there is a proposal[0] for something that could be called ‘BigDecimal’ in ECMAScript, but it’s a stage 0 proposal[1]. As for why a decimal type hasn’t progressed further in ECMAScript you’ll want to read the notes [2] from the meeting where the latest proposal was discussed.

[0] https://docs.google.com/presentation/d/1jPsw7EGsS6BW59_BDRu9...

[1] https://github.com/tc39/proposals/blob/master/stage-0-propos...

[2] https://github.com/rwaldron/tc39-notes/blob/b8da60318b564f13...

It is relative common for software to need integers larger than 53 bits. It seems quite uncommon for software to require Decimal arithmetic. Do you have a motivating example?

Anything that deals with money. Every e-commerce or fintech app.

Reply on news.ycombinator.com