Ruby - conversion string to float return 0.0

Question

In a variable is stored this value: $10.00 And I need to get this 10.00

I've tried to convert this value to float:

new_price = '%.2f' % (price.to_f)

but I get just 0.0.

What's wrong with that? I've tried also

price = price.strip
price[0]=""
new_price = '%.2f' % (price.to_f)

But even this didn't help me... where is a problem?

Thanks

Answer 1

You need to remove the $ first. The whole thing like this:

'%.2f' % '$10.00'.delete( "$" ).to_f

or

'%.2f' % '$10.00'[1..-1].to_f

if you like density and may encounter non dollars.