Convert columns to row using awk Post: 302756107

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Top Forums Shell Programming and Scripting Convert columns to row using awk Post 302756107 by radoulov on Tuesday 15th of January 2013 08:05:09 AM

01-15-2013

Registered User

I'll try to explain the script.

Code:

func buildrec() {
  if (match($0, />[^<]*<\//))
    rec = length(rec) ? rec OFS substr($0, RSTART + 1, RLENGTH - 3) : \
      substr($0, RSTART + 1, RLENGTH - 3)

buildrec is a user defined function that I used to avoid to repeat the same code for every match.
The function doesn't require parameters as it directly modifies
the global variable rec.
The function code performs the following actions:
- search for the pattern: an > followd by 0 or more occurrences of characters different than <, followed by the closing tag sequence </,
using the following regular expression: >[^<]*<\/
- when match is found, the value is appended to the variable rec (short for record). RSTART and RLENGTH are automatically set by the match builtin function

After that, the code is simple:

Code:

  /col[1-3,5]/ { buildrec() }
  /<TR class="[^"]*"> *$/ && length(rec) {
    print rec
    rec = x
    }

When the records match the pattern represented by the regular expression col[1-3,5], build the record - append the values.
When the pattern <TR class="[^"]*"> *$ matches for a second time (rec is already build) - print the record and reset it: rec = x.
x is an uninitialized variable, so I'm using it as a shortcut for "".

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LEARN ABOUT DEBIAN

layout::manager::grid

Layout::Manager::Grid(3pm)				User Contributed Perl Documentation				Layout::Manager::Grid(3pm)

NAME

       Layout::Manager::Grid - Simple grid-based layout manager.

DESCRIPTION

       Layout::Manager::Grid is a layout manager places components into evenly divided cells.

       When you instantiate a Grid manager, you must supply it with a count of how many rows and columns it will have.	For example, a Grid with 1
       column and 2 rows would look like:

	 +--------------------------------+
	 |				  |
	 |	     component 1	  |
	 |				  |
	 +--------------------------------+
	 |				  |
	 |	     component 2	  |
	 |				  |
	 +--------------------------------+

       The container is divided into as many <rows> * <columns> cells, with each taking up an equal amount of space.  A grid with 3 columns and 2
       rows would create 6 cells that consume 33% of the width and 50% of the height.

       Components are placed by specifying the cell they reside in via the row and column number.

	 $container->add_component($comp, { row => 0, column => 3 });

	 $container->add_component($comp, { row => 0, column => 2, height => 2 });

       Optionally, you may choose to override the default "width" or "height" of 1.  Setting it to a something else will cause the component to
       consume that many rows or columns worth of space.

       Grid is similar to Java's GridLayout <http://java.sun.com/docs/books/tutorial/uiswing/layout/grid.html>.

SYNOPSIS

	 $cont->add_component($comp1, { row => 0, column => 1 });
	 $cont->add_component($comp2, { row => 0, column => 2 });

	 my $lm = Layout::Manager::Grid->new(rows => 1, columns => 2);
	 $lm->do_layout($con);

   DYNAMIC SIZING
       If the container that the Grid is manging does not have one or both of it's dimensions set, Grid will compute the appropriate sizes.  The
       simple way for me to avoid writing a long explanation is to say it works similar to HTML tables.  Rows will become as big as their biggest
       consituent, as will columns.  It is common to add a Grid-managed component to a scene with only one of it's dimensions set.

ATTRIBUTES

   columns
       The number of columns in this Grid.

   rows
       The number of rows in this Grid.

METHODS

   do_layout
       Size and position the components in this layout.

AUTHOR

       Cory Watson, "<gphat@cpan.org>"

COPYRIGHT &; LICENSE
       Copyright 2008 - 2010 Cory G Watson

       This program is free software; you can redistribute it and/or modify it under the same terms as Perl itself.

perl v5.12.3							    2011-05-16						Layout::Manager::Grid(3pm)