with this format "20130411". Not "2013.kjh" or "NN.201304", or "2013mmkk04".

You might need to refine your definition of 'this format'. Must it be a valid date ? Can it be in the future ? Can it be anywhere in the past ? Could it be less than 8 digits ? ... Etc. If you'd want _precisely_ 8 digits and wouldn't care about validness of the date,

m/^[\d]{8}$/ might be the regex you want,


Krambambuli

---

---

---

• 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.