Regex match and grouping

Question

Here's a sample string which I want do a regex on

101-nocola_conte_-_fuoco_fatuo_(koop_remix)

The first digit in "101" is the disc number and the next 2 digits are the track numbers. How do I match the track numbers and ignore the disc number (first digit)?

Answer 1

Something like

/^\d(\d\d)/

Would match one digit at the start of the string, then capture the following two digits

Answer 2

^\d(\d\d)

You may need \ in front of the ( depending on which environment you intend to run the regex into (like vi(1)).

Answer 3

Do you mean that you don't mind what the disk number is, but you want to match, say, track number 01 ?

In perl you would match it like so: "^[0-9]01.*"
or more simply "^.01.*" - which means that you don't even mind if the first char is not a digit.

Answer 4

Wow, thanks guys!

Answer 5

Which programming language? For the shell something with egrep will do the job:

echo '101-nocola_conte_-_fuoco_fatuo_(koop_remix)' | egrep -o '^[0-9]{3}' | egrep -o '[0-9]{2}$'