Beefy Boxes and Bandwidth Generously Provided by pair Networks
Do you know where your variables are?
 
PerlMonks  

comment on

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

Like this:

while ( my $row = $csv_in->getline($fh_in) ) { # print out each line you visit during the while loop local $"='|'; print STDERR "<@$row>\n"; $csv_out->print( $fh_out, [ @$row[ 2, 3, 0, 4 ], ] ); }

Your code was getting Can't use an undefined value as an ARRAY reference at because you were trying to dereference $row as an array reference before you ever used it as an array reference. Also "my" in a while statement scopes the variable to inside the while loop. my $row outside the while loop and while (my $row...) are actually to different variables with two different locations in memory. Using the variable as an array reference inside the while loop doesn't have any effect on how Perl sees the variable of the same name found outside of the while loop.

Best, beth


In reply to Re^3: line ending problem Text::CSV alternative Text::ParseWords? by ELISHEVA
in thread line ending problem Text::CSV alternative Text::ParseWords? by GertMT

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 2024-03-29 14:38 GMT
Sections?
Information?
Find Nodes?
Leftovers?
    Voting Booth?

    No recent polls found