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Top Forums Shell Programming and Scripting Aligning columns in a text file using Perl Post 302619751 by smarty86 on Friday 6th of April 2012 04:50:54 AM
Old 04-06-2012
Aligning columns in a text file using Perl

Hi All,

I am new to perl and was trying to write a simple program which will generate a text file as output..

now the output which i am getting is something like this..

Code:
==================================================================================================
Col1                                         |                     Col2
==================================================================================================
value1                                                            Updated this row
value1                                                            Updated this row also
value1                                                            Updated again
value1                                                            Changed table contents
value-value-value-value-value2                                  added few lines of code
value-value-value-value-value2                                  added another few lines using perl
ABCDEFGH                                                updated code to add few lines
TESTING                                              added new testing procedure
TESTING AGAIN                                                  Updated General info
ABCDEFG TESTING, AGAIN AND AGAIN                                      Updated information
ABCDEFG TESTING, AGAIN AND AGAIN                                      Updated home address
==================================================================================================

the code i am using to get the above output is

Code:
printf MY_FILE ( "%s \t\t\t\t\t %-20s\n",$title,$desc);

i want output to be in this pattern

Code:
==================================================================================================
Col1                                                      | Col2
==================================================================================================
value1                                                    | Updated this row
value1                                                    | Updated this row also
value1                                                    | Updated again
value1                                                    | Changed table contents
value-value-value-value-value2                            | added few lines of code
value-value-value-value-value2                            | added another few lines using perl
ABCDEFGH                                                  | updated code to add few lines
TESTING                                                   | added new testing procedure
TESTING AGAIN                                             | Updated General info
ABCDEFG TESTING, AGAIN AND AGAIN                          | Updated information
ABCDEFG TESTING, AGAIN AND AGAIN                          | Updated home address
==================================================================================================

please help me to get this output in alligned manner!!
 

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Text::Wrap(3pm) 					 Perl Programmers Reference Guide					   Text::Wrap(3pm)

NAME
Text::Wrap - line wrapping to form simple paragraphs SYNOPSIS
Example 1 use Text::Wrap $initial_tab = " "; # Tab before first line $subsequent_tab = ""; # All other lines flush left print wrap($initial_tab, $subsequent_tab, @text); print fill($initial_tab, $subsequent_tab, @text); @lines = wrap($initial_tab, $subsequent_tab, @text); @paragraphs = fill($initial_tab, $subsequent_tab, @text); Example 2 use Text::Wrap qw(wrap $columns $huge); $columns = 132; # Wrap at 132 characters $huge = 'die'; $huge = 'wrap'; $huge = 'overflow'; Example 3 use Text::Wrap $Text::Wrap::columns = 72; print wrap('', '', @text); DESCRIPTION
"Text::Wrap::wrap()" is a very simple paragraph formatter. It formats a single paragraph at a time by breaking lines at word boundries. Indentation is controlled for the first line ($initial_tab) and all subsequent lines ($subsequent_tab) independently. Please note: $ini- tial_tab and $subsequent_tab are the literal strings that will be used: it is unlikley you would want to pass in a number. Text::Wrap::fill() is a simple multi-paragraph formatter. It formats each paragraph separately and then joins them together when it's done. It will destory any whitespace in the original text. It breaks text into paragraphs by looking for whitespace after a newline. In other respects it acts like wrap(). OVERRIDES
"Text::Wrap::wrap()" has a number of variables that control its behavior. Because other modules might be using "Text::Wrap::wrap()" it is suggested that you leave these variables alone! If you can't do that, then use "local($Text::Wrap::VARIABLE) = YOURVALUE" when you change the values so that the original value is restored. This "local()" trick will not work if you import the variable into your own namespace. Lines are wrapped at $Text::Wrap::columns columns. $Text::Wrap::columns should be set to the full width of your output device. In fact, every resulting line will have length of no more than "$columns - 1". It is possible to control which characters terminate words by modifying $Text::Wrap::break. Set this to a string such as '[s:]' (to break before spaces or colons) or a pre-compiled regexp such as "qr/[s']/" (to break before spaces or apostrophes). The default is simply 's'; that is, words are terminated by spaces. (This means, among other things, that trailing punctuation such as full stops or commas stay with the word they are "attached" to.) Beginner note: In example 2, above $columns is imported into the local namespace, and set locally. In example 3, $Text::Wrap::columns is set in its own namespace without importing it. "Text::Wrap::wrap()" starts its work by expanding all the tabs in its input into spaces. The last thing it does it to turn spaces back into tabs. If you do not want tabs in your results, set $Text::Wrap::unexapand to a false value. Likewise if you do not want to use 8-character tabstops, set $Text::Wrap::tabstop to the number of characters you do want for your tabstops. If you want to separate your lines with something other than " " then set $Text::Wrap::seporator to your preference. When words that are longer than $columns are encountered, they are broken up. "wrap()" adds a " " at column $columns. This behavior can be overridden by setting $huge to 'die' or to 'overflow'. When set to 'die', large words will cause "die()" to be called. When set to 'overflow', large words will be left intact. Historical notes: 'die' used to be the default value of $huge. Now, 'wrap' is the default value. EXAMPLE
print wrap(" ","","This is a bit of text that forms a normal book-style paragraph"); AUTHOR
David Muir Sharnoff <muir@idiom.com> with help from Tim Pierce and many many others. perl v5.8.0 2002-06-01 Text::Wrap(3pm)
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