Ruby string with USD “money” converted to number

问题

Is there currently a gem that's capable of taking strings, all in USD for this purpose, and converting them to a number? Some examples would be:

"$7,600" would turn into 7600
"5500" would turn into 5500

I know on the "5500" example I can just do "5500".to_i, but the spreadsheets being imported aren't consistent and some include commas and dollar signs while others do not. There a decent way of handling this across the board in Ruby?

I've tried something like money_string.scan(/\d/).join which seems to be fine, just worried I'll run into edge cases I haven't found yet, such as decimal places.

回答1:

Why not remove all non-digit characters before calling .to_i

Example:

"$7,600".gsub(/\D/,'').to_i

And for a floating point number:

"$7,600.90".gsub(/[^\d\.]/, '').to_f

回答2:

You can do:

"$100.00".scan(/[.0-9]/).join().to_f

or to_i if they're only dollars

回答3:

You could use the Money gem

Money.parse("$100") == Money.new(10000, "USD")

回答4:

You should be able to trim any non-numeric characters with a Ruby RegEx object. Sanitize your inputs to remove anything but numbers to the left of a decimal point, and then parse the numbers-only string as a number.

(And note that, if you're getting actual spreadsheets instead of CSV bunk, there's likely a value property you can read that ignores the text displayed on screen.)

回答5:

def dollar_to_number(dollarPrice)
  if dollarPrice
    dollarPrice[1, dollarPrice.length].to_i
  end
end

回答6:

You can use the Monetize gem:

pry(main)> Monetize.parse("$7,600").to_i
=> 7600

https://github.com/RubyMoney/monetize

pry(main)> Monetize.parse("$7,600").class
=> Money

来源：https://stackoverflow.com/questions/20484084/ruby-string-with-usd-money-converted-to-number

标签

ruby-on-rails

ruby

currency