Beefy Boxes and Bandwidth Generously Provided by pair Networks
Syntactic Confectionery Delight
 
PerlMonks  

comment on

( [id://3333]=superdoc: print w/replies, xml ) Need Help??
Fellow monks,

I was surfing around Yahoo Answers the other day and a person was asking for an explanation of what the following regex did:

s/^\[[0-9]{2}-[0-9]-{2}-([0-9]{2} | [0-9] {2, 4})\]\s+//;

Of course I pointed him towards YAPE::Regex and presented him with the explanation output, but what struck me as odd was the

([0-9]{2} | [0-9] {2, 4})

Unless I'm mistaken, you're matching 2 numbers or between 2 and 4 numbers. Why would use the | there? If you're matching between 2 and 4 numbers you're matching 2 already aren't you? Am I just missing something here?


To disagree, one doesn't have to be disagreeable - Barry Goldwater


In reply to Redundant regex ([0-9]{2} | [0-9] {2, 4})? by Popcorn Dave

Title:
Use:  <p> text here (a paragraph) </p>
and:  <code> code here </code>
to format your post; it's "PerlMonks-approved HTML":



  • Are you posting in the right place? Check out Where do I post X? to know for sure.
  • Posts may use any of the Perl Monks Approved HTML tags. Currently these include the following:
    <code> <a> <b> <big> <blockquote> <br /> <dd> <dl> <dt> <em> <font> <h1> <h2> <h3> <h4> <h5> <h6> <hr /> <i> <li> <nbsp> <ol> <p> <small> <strike> <strong> <sub> <sup> <table> <td> <th> <tr> <tt> <u> <ul>
  • Snippets of code should be wrapped in <code> tags not <pre> tags. In fact, <pre> tags should generally be avoided. If they must be used, extreme care should be taken to ensure that their contents do not have long lines (<70 chars), in order to prevent horizontal scrolling (and possible janitor intervention).
  • Want more info? How to link or How to display code and escape characters are good places to start.
Log In?
Username:
Password:

What's my password?
Create A New User
Domain Nodelet?
Chatterbox?
and the web crawler heard nothing...

How do I use this?Last hourOther CB clients
Other Users?
Others drinking their drinks and smoking their pipes about the Monastery: (3)
As of 2024-03-28 15:44 GMT
Sections?
Information?
Find Nodes?
Leftovers?
    Voting Booth?

    No recent polls found