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Full Discussion: Extract a line from a file.
Top Forums Shell Programming and Scripting Extract a line from a file. Post 302388927 by amitranjansahu on Friday 22nd of January 2010 01:02:51 AM
Old 01-22-2010
cat xxx.txt | head -3| tail -1
 

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Locale::Maketext::Extract::Plugin::Base(3)		User Contributed Perl Documentation		Locale::Maketext::Extract::Plugin::Base(3)

NAME
Locale::Maketext::Extract::Plugin::Base - Base module for format parser plugins SYNOPSIS
package My::Parser::Plugin; use base qw(Locale::Maketext::Extract::Plugin::Base); sub file_types { return [qw( ext ext2 )] } sub extract { my $self = shift; local $_ = shift; my $line = 1; while (my $found = $self->routine_to_extract_strings) { $self->add_entry($str,[$filename,$line,$vars]) } return; } DESCRIPTION
All format parser plugins in Locale::Maketext::Extract inherit from Locale::Maketext::Extract::Plugin::Base. If you want to write your own custom parser plugin, you will need to inherit from this module, and provide "file_types()" and "extract()" methods, as shown above. METHODS
new() $plugin = My::Parser->new( @file_types # Optionally specify a list of recognised file types ) add_entry() $plugin->add_entry($str,$line,$vars) "entries()" $entries = $plugin->entries; "clear()" $plugin->clear Clears all stored entries. file_types() @default_file_types = $plugin->file_types Returns a list of recognised file types that your module knows how to parse. Each file type can be one of: o A plain string 'pl' => base filename is matched against qr/.pl$/ '*' => all files are accepted o A regex qr/.tt2?./ => base filename is matched against this regex o A codref sub {} => this codref is called as $coderef->($base_filename,$path_to_file) It should return true or false extract() $plugin->extract($filecontents); extract() is the method that will be called to process the contents of the current file. When it finds a string that should be extracted, it should call $self->add_entry($string,$line,$vars]) where $vars refers to any arguments that are being passed to the localise function. For instance: l("You found [quant,_1,file,files]",files_found) string: "You found [quant,_1,file,files]" vars : (files_found) IMPORTANT: a single plugin instance is used for all files, so if you plan on storing state information in the $plugin object, this should be cleared out at the beginning of "extract()" known_file_type() if ($plugin->known_file_type($filename_with_path)) { .... } Determines whether the current file should be handled by this parser, based either on the list of file_types specified when this object was created, or the default file_types specified in the module. SEE ALSO
xgettext.pl for extracting translatable strings from common template systems and perl source files. Locale::Maketext::Lexicon Locale::Maketext::Extract::Plugin::Perl Locale::Maketext::Extract::Plugin::PPI Locale::Maketext::Extract::Plugin::TT2 Locale::Maketext::Extract::Plugin::YAML Locale::Maketext::Extract::Plugin::FormFu Locale::Maketext::Extract::Plugin::Mason Locale::Maketext::Extract::Plugin::TextTemplate Locale::Maketext::Extract::Plugin::Generic AUTHORS
Clinton Gormley [DRTECH] <clinton@traveljury.com> COPYRIGHT
Copyright 2002-2008 by Audrey Tang <cpan@audreyt.org>. This software is released under the MIT license cited below. The "MIT" License Permission is hereby granted, free of charge, to any person obtaining a copy of this software and associated documentation files (the "Software"), to deal in the Software without restriction, including without limitation the rights to use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies of the Software, and to permit persons to whom the Software is furnished to do so, subject to the following conditions: The above copyright notice and this permission notice shall be included in all copies or substantial portions of the Software. THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE. perl v5.16.2 2011-03-02 Locale::Maketext::Extract::Plugin::Base(3)
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