Multiply or Divide Money with Money?

[andrewtimberlake]

Does it make any sense to multiply or divide a Money with a Money?
I don’t usually say $5 * $5, it would be $5 * 5
I also don’t say $5 / $5 but rather $5 / 5

[andrewtimberlake]

A Money implementation I have in Ruby actually does the following:

Money.new(10) / 2
# => [#<Money $5.00>, #<Money $5.00>]

While that initially seemed weird to me, it actually makes sense with how money is used.

Money.new(11) / 3
# => [#<Money $3.67>, #<Money $3.67>, #<Money $3.66>]

[liuggio]

Does it make any sense to multiply or divide a Money with a Money?

I think it doesn't... 👍

About the list as return value
the other way is using upper and lower bound... doesn't look weird to me (your idea I mean).

I think we should add also percentage with this notation, what do you think?

[andrewtimberlake]

Can you elaborate on "upper and lower bound"
Percentage is also a good idea. That would be useful for tax calculations. Any ideas on the interface?

[liuggio]

the other way was to pass options like:
round-up that rounds the money to the smallest integer greater than or equal to num
round-down that rounds the money to the largest integer less than or equal to num

but we could go with your idea... and let's think about it later...

[liuggio]

implemented by #22