Money as Double?

[DiegoNolan]

Why is money not fixed point? Haskell has Rational.

[wraithm]

The reason why I did this is that the Lending Club API uses floating point,
at least superficially (eg.
https://www.lendingclub.com/developers/summary.action). You caught me. I
was lazy.

You're absolutely right that it makes more sense to use fixed point
instead. Something like scientific might be a good candidate.

What do you think Integer, scientific, something else? I'm very open to
other suggestions.

On Mon, Sep 7, 2015 at 11:38 PM, Nolan Sandberg [email protected]
wrote:

Why is money not fixed point? Haskell has Rational.

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#1.

[dmjio]

Scientific or Decimal, probably

Sent from my iPhone

On Sep 7, 2015, at 11:57 PM, Matthew Wraith [email protected] wrote:

The reason why I did this is that the Lending Club API uses floating point,
at least superficially (eg.
https://www.lendingclub.com/developers/summary.action). You caught me. I
was lazy.

You're absolutely right that it makes more sense to use fixed point
instead. Something like scientific might be a good candidate.

What do you think Integer, scientific, something else? I'm very open to
other suggestions.

On Mon, Sep 7, 2015 at 11:38 PM, Nolan Sandberg [email protected]
wrote:

Why is money not fixed point? Haskell has Rational.

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#1.

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[DiegoNolan]

I'm wondering if it is necessary though. If we are using application/json I don't know if it matters since in javascript all numbers are represented as doubles. I guess when we end of doing arithmetic operations on the results we get from the API it may matter.

[wraithm]

Yeah, you're exactly where I was thinking when I wrote this thing. You're
exactly right that lending club is using doubles for the json, and that's
why I used doubles. Again, you're right that you get precision issues when
you do arithmetic on that data using this library.

I don't know anything about Decimal. My favorite would probably be using
Integer.
On Sep 8, 2015 12:09, "Nolan Sandberg" [email protected] wrote:

I'm wondering if it is necessary though. If we are using application/json
I don't know if it matters since in javascript all numbers are represented
as doubles. I guess when we end of doing arithmetic operations on the
results we get from the API it may matter.

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#1 (comment).