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Extracting Data from a File

 
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Old 07-31-2007
Extracting Data from a File
Hi

I need to calculate the number of occurrences of a item in a number of files using Perl.
The item appears continually throughout the files but in each case I only want to calculate it in certain blocks of the file.
Example - Calculalte the number of occurrences of a 'pass' in a block of code which starts with 'Start' and end with 'Finish'.
It is not possible to say start at line 1 and count the number of occurrences of the item until you reach line 5 as the files are all different sizes and the block is located at different places in all the files.

I'm sure this is possible but I just can't seem to get my head around this Perl scripting

Any help would be great
OOP
 
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LEARN ABOUT DEBIAN

algorithm::dependency::source::file

Algorithm::Dependency::Source::File(3pm)		User Contributed Perl Documentation		  Algorithm::Dependency::Source::File(3pm)

NAME

       Algorithm::Dependency::Source::File - File source for dependency heirachys

DESCRIPTION

       Algorithm::Dependency::Source::File implements a source where the items are stored in a flat file or a relatively simple format.

   File Format
       The file should be an ordinary text file, consisting of a series of lines, with each line completely containing the information for a
       single item.  Blank lines, or lines beginning with the hash character '#' will be ignored as comments.

       For a single item line, only word characters will be used. A 'word character' consists of all letters and numbers, and the underscore '_'
       character.  Anything that is not a word character will be assumed to be a seperator.

       The first word will be used as the name or id of the item, and any further words in the line will be used as other items that this one
       depends on. For example, all of the following are legal.

	 # A single item with no dependencies
	 Foo

	 # Another item that depends on the first one
	 Bar Foo

	 # Depending on multiple others
	 Bin Foo Bar

	 # We can use different seperators
	 One:Two|Three-Four+Five=Six Seven

	 # We can also use multiple non-word characters as seperators
	 This&*&^*&File:  is& & & :::REALLY()Neat

       From the examples above, it should be easy to create your own files.

METHODS

       This documents the methods differing from the ordinary Algorithm::Dependency::Source methods.

   new $filename
       When constructing a new Algorithm::Dependency::Source::File object, an argument should be provided of the name of the file to use. The
       constructor will check that the file exists, and is readable, returning "undef" otherwise.

SUPPORT

       To file a bug against this module, use the CPAN bug tracking system

       http://rt.cpan.org/NoAuth/ReportBug.html?Queue=Algorithm-Dependency <http://rt.cpan.org/NoAuth/ReportBug.html?Queue=Algorithm-Dependency>

       For other comments, contact the author.

AUTHOR

       Adam Kennedy <adamk@cpan.org>

SEE ALSO

       Algorithm::Dependency

COPYRIGHT

       Copyright 2003 - 2009 Adam Kennedy.

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

       The full text of the license can be found in the LICENSE file included with this module.

perl v5.12.4							    2009-04-14				  Algorithm::Dependency::Source::File(3pm)