regex - Extract text from a string

Question

How do I extract the "program name" from a string. The string will look like this :

% O0033(SUB RAD MSD 50R III) G91G1X-6.4Z-2.F500 G3I6.4Z-8. G3I6.4 G3R3.2X6.4F500 G91G0Z5. G91G1X-10.4 G3I10.4 G3R5.2X10.4 G90G0Z2. M99 %

The program name is (SUB RAD MSD 50R III). Storing the result in another string is fine. I'm learning powershell so any explaination of your answers will be appreciated.

Answer 1

The following regex extract anything between the parenthesis:

PS> $prog = [regex]::match($s,'(([^)]+))').Groups[1].Value
PS> $prog
SUB RAD MSD 50R III


Explanation (created with RegexBuddy)

Match the character '(' literally ?(?
Match the regular expression below and capture its match into backreference number 1 ?([^)]+)?
   Match any character that is NOT a ) character ?[^)]+?
      Between one and unlimited times, as many times as possible, giving back as needed (greedy) ?+?
Match the character ')' literally ?)?

Check these links:

http://www.regular-expressions.info

http://powershell.com/cs/blogs/tobias/archive/2011/10/27/regular-expressions-are-your-friend-part-1.aspx

http://powershell.com/cs/blogs/tobias/archive/2011/12/02/regular-expressions-are-your-friend-part-2.aspx

http://powershell.com/cs/blogs/tobias/archive/2011/12/02/regular-expressions-are-your-friend-part-3.aspx