Rails：数字到货币，删除尾随零

How can I use number_to_currency and make it delete the zeros in the decimal part?

如何使用number_to_currency并删除小数部分中的零？

So if I have a number 30.50, I want to keep the .50, but if I have 30.00, I want to delete those zeros. I see the precision, but I don't know if I can use it conditionally to just be applied if the trailing decimals are zeros...

所以，如果我有一个30.50的数字，我想保留.50，但如果我有30.00，我想删除那些零。我看到精度，但我不知道如果尾随小数为零，我是否可以有条件地使用它...

Thanks

谢谢

2 个解决方案

#1

num = 30.00
number_to_currency(num, :precision => (num.round == num) ? 0 : 2)
  => $30

num = 30.05
number_to_currency(num, :precision => (num.round == num) ? 0 : 2)
  => $30.05

#2

I use money strings , so I do it a different way :

我使用金钱字符串，所以我采用不同的方式：

def string_to_cents str
    new_str = number_to_currency(str,  :format => "%n")
    if new_str && new_str[-3..-1] == ".00"
        new_str[-3..-1] = ""
    end
    new_str
end