Beefy Boxes and Bandwidth Generously Provided by pair Networks
P is for Practical
 
PerlMonks  

comment on

( [id://3333]=superdoc: print w/replies, xml ) Need Help??
That may work, but that regex hurts my head. The only way I would use that code is if it were commented well as to what each part of the regex does - even then I might not use it.

A much clearer, albeit more code and more steps method, would be to:
1. read from the input file, and 2. write only lines that you want to write to a temporary output file, and 3. close the input file 4. rename the temporary output file to the input file's name.
This method would allow you to read ahead one (or more than one) line to see if there are 2 more more blank lines together.

Just my preference, but IMHO much clearer than trying to decifer that regex. My choice is to always make my code as understandable to *everyone* (including newbies) as possible. Obfuscated regex's do more to scare people away from Perl. Just my 2c.

HTH.

In reply to Re: Re: remove single blank lines? by hmerrill
in thread remove single blank lines? by aloomens

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 having an uproarious good time at the Monastery: (6)
As of 2024-03-28 12:10 GMT
Sections?
Information?
Find Nodes?
Leftovers?
    Voting Booth?

    No recent polls found