Beefy Boxes and Bandwidth Generously Provided by pair Networks
Just another Perl shrine
 
PerlMonks  

structured printing of arrays

( #252747=categorized question: print w/ replies, xml ) Need Help??
Contributed by hacker_j99 on Apr 24, 2003 at 02:36 UTC
Q&A  > arrays


Description:

I have a array of arrays.
how can i get it to look like this with values of unknown length
+----+----------+------------+-----------+---------+----------+ | id | user_lvl | first_name | last_name | surname | homepage | +----+----------+------------+-----------+---------+----------+ | 1 | 50 | unknownlen | | | none | +----+----------+------------+-----------+---------+----------+

Answer: structured printing of arrays
contributed by graff

There is a handy module on CPAN called Data::ShowTable, which provides the pretty borders and handles a lot of the busywork of formatting the table output, but using it effectively for this sort of thing still involves some work -- you have to tell it what the maximum column widths are that you want for your table (and if you hand it data that doesn't fit within those widths, it will do an adequate, readable, but not-so-pretty job if wrapping the contents within a table cell, so no information is lost). Here's a relevant sample of usage -- I never used this module before, and I figured out the example based on reading the man page (so the documentation for this module is good):

use Data::ShowTable; my @AoA = ( [ qw/id user_lvl first_name last_name surname homepage/ ], [ '1', '50', 'unknownlengh', '', ' ', 'none' ], [ qw/5000 0 Joe Papadakolopolous AlsoTooLong www.younameit +.org/ ], ); my $header = shift @AoA; # extract the column labels to a separate ar +ray # You can set "default" column widths to be the lengths of # the column header strings, like this: my @colwidth = map { length() } @$header; # If you don't do at least that much work to initialize # column widths, you probably won't like the output. # figure out the maximum data widths for each column; these will have +an # effect on output when they happen to be wider than the corresponding # column header string: my @colwidth; for $row ( @AoA ) { for ( $col=0; $col<@$row; $col++ ) { my $l = length( $$row[$col] ); $colwidth[$col] = $l if ( $colwidth[$col] < $l ); } } # Note that the args this and other ShowTable methods are all REFERENC +ES: ShowBoxTable $header, [qw/int int text text text text/], \@colwidth, \ +&rowsub; # Here's the sub that ShowTable needs so that it can fetch # one row of data per call: sub rowsub { my $arg = shift; if ( $arg ) { return; } elsif ( scalar @AoA ) { my $rowref = shift @AoA; return (@$rowref); } else { return; } }
Answer: structured printing of arrays
contributed by jasonk

Text::ASCIITable

Please (register and) log in if you wish to add an answer



  • Posts are HTML formatted. Put <p> </p> tags around your paragraphs. Put <code> </code> tags around your code and data!
  • Read Where should I post X? if you're not absolutely sure you're posting in the right place.
  • Please read these before you post! —
  • Posts may use any of the Perl Monks Approved HTML tags:
    a, abbr, b, big, blockquote, br, caption, center, col, colgroup, dd, del, div, dl, dt, em, font, h1, h2, h3, h4, h5, h6, hr, i, ins, li, ol, p, pre, readmore, small, span, spoiler, strike, strong, sub, sup, table, tbody, td, tfoot, th, thead, tr, tt, u, ul, wbr
  • Outside of code tags, you may need to use entities for some characters:
            For:     Use:
    & &amp;
    < &lt;
    > &gt;
    [ &#91;
    ] &#93;
  • Link using PerlMonks shortcuts! What shortcuts can I use for linking?
  • See Writeup Formatting Tips and other pages linked from there for more info.
  • Log In?
    Username:
    Password:

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

    How do I use this? | Other CB clients
    Other Users?
    Others meditating upon the Monastery: (9)
    As of 2014-12-22 23:48 GMT
    Sections?
    Information?
    Find Nodes?
    Leftovers?
      Voting Booth?

      Is guessing a good strategy for surviving in the IT business?





      Results (133 votes), past polls