Regular Expression pattern matching question...

rubyonrails-talk
1

Hi there, I'm trying to split a string using RegExp to extract a price from it. The price may or may not have a dollar sign in front of it and may or may not contain a decimal value. Below are some string examples of what the regular expression would need to handle to split out the price:

Example 1: "2 starbuck's coffees 9.99" <- price is 9.99

Example 2: "99 red baloons 175" <- price is 175

Example 3: "starbuck's coffee $9.99" <- price is 9.99

Example 4: "starbucks coffee 9" <- price is 9

So the trouble is: a) in Example 3, I can't count on the dollar sign being there all the time. Some instances it will, other instances it won't and b) in the case of Example 2, there may be a number at the start of the string of indeterminate length that I want to ignore since this could represent the quantity, not the price.

What would the RegExp look like that would split out the price?

Thanks in advance. -A

2

eg /(\d+\.){0,1}\d+$/

g jo

3

you can always use http://www.rubular.com/ to test your RexExp.

4

you can always use http://www.rubular.com/ to test your RexExp.

This Website does not work correctly.

g jo