将字符串(用逗号)转换为整数

I want to convert a string into an integer. The value of the array is 19,99 as a string in my DB column (because of the comma).

我想把一个字符串转换成一个整数。数组的值为19,99作为DB列中的字符串(因为有逗号)。

<% @sales.each do |sale| %>
  <% if current_user.id == sale.user_id %>
   <% price = Warehouse.where(:product => sale.product).pluck(:mrr) %>
   <% price = price.shift.strip.to_i %>
   <% agent = current_user.sales.count.to_i %>
   <%= value = agent * price %>
  <% end %>
<% end %>

current_user.sales.count is 2 and mrr is "19,99". I want to multiply those two values but the result is just "38 38".

current_user.sales。计数是2,mrr是19 99。我想把这两个值相乘，结果是38 38。

Does anybody now what to do?

现在有人该怎么办吗?

2 个解决方案

#1

 '38,38'.split(',').join('.').to_f * 2
 #=> 76.76

Another option is using String#sub (thanks @Stefan!):

另一个选择是使用字符串#sub(感谢@Stefan!):

'38,38'.sub(',', '.').to_f * 2
#=> 76.76

#2

Use .to_f instead of .to_i to convert it to float. I should work with comma, too.

使用.to_f而不是.to_i将其转换为float。我也应该用逗号。

http://goo.gl/LZmxW4

#1

 '38,38'.split(',').join('.').to_f * 2
 #=> 76.76