regexp: match only if previous matched?

[cirfu]

I need to extract prices froma html-document.

[0-9]*\$ matches 112$ 45$ etc but also just a $. why that shouldnt
really matter and it is unlikely anyway to appear a $sign with no
price attahced to it I still want to prevent it.

How do I avoid matching "$"? It has to be "nbr$".

 

[Carl Banks]

I need to extract prices froma html-document.

[0-9]*\$ matches 112$ 45$ etc but also just a $. why that shouldnt
really matter and it is unlikely anyway to appear a $sign with no
price attahced to it I still want to prevent it.

How do I avoid matching "$"? It has to be "nbr$".

The answer to your question is to use a + instead of *. + matches 1
or more elements, * matches zero or more.

The second point to mention is that, at least where I come from, the
currency symbol comes before the number:

$112 and $45

In which case your regexp should be somehting like this: \$[0-9]+


Carl Banks