Beefy Boxes and Bandwidth Generously Provided by pair Networks
go ahead... be a heretic

Re: Understanding this particular Regex.

by NetWallah (Canon)
on May 05, 2013 at 07:13 UTC ( #1032110=note: print w/replies, xml ) Need Help??

in reply to Understanding this particular Regex.

The "+" matches "the previous item" one or more times.

In this case, "the previous item" is a digit [0-9].

So, at least ONE digit is required, but more digits, if present, are acceptable and will match.

In your example of a solitary "4", the "+" does NOT match anything beyond that digit.

The subsequent " *" matches zero or more trailing spaces. See "Quantifiers" in perldoc perlre.

             "I'm fairly sure if they took porn off the Internet, there'd only be one website left, and it'd be called 'Bring Back the Porn!'"
        -- Dr. Cox, Scrubs

  • Comment on Re: Understanding this particular Regex.

Replies are listed 'Best First'.
Re^2: Understanding this particular Regex.
by tty1x (Novice) on May 05, 2013 at 07:33 UTC
    Ahh thanks alot for the explanation. Guess my understanding of the + quantifier isn't that great .

Log In?

What's my password?
Create A New User
Node Status?
node history
Node Type: note [id://1032110]
LanX questions the integerity of this approach. ..
LanX doesn't sound natural
[LanX]: welcome to a new episode of Big Perl Theory...

How do I use this? | Other CB clients
Other Users?
Others pondering the Monastery: (9)
As of 2018-03-20 10:34 GMT
Find Nodes?
    Voting Booth?
    When I think of a mole I think of:

    Results (250 votes). Check out past polls.