NAME
    Path::Class::Each - Iterate lines in a file

VERSION
    This document describes Path::Class::Each version 0.01

SYNOPSIS
      use Path::Class;
      use Path::Class::Each;

      # Iterator interface
      my $iter = file( 'foo', 'bar' )->iterator;
      while ( defined( my $line = $iter->() ) ) {
        print "Line: $line\n";
      }

      # 'next' interface
      my $file = file( 'foo', 'bar' );
      while ( defined( my $line = $file->next ) ) {
        print "Line: $line\n";
      }

      # Callback interface
      file( 'foo', 'bar' )->each(
        sub {
          print "Line: $_\n";
        }
      );

DESCRIPTION
    "Path::Class::Each" augments Path::Class::File to provide three
    different ways of iterating over the lines of a file.

    "Path::Class::File" provides a "slurp" method that returns the contents
    of a file (either as a scalar or an array) but has no support for
    reading a file a line at a time. For large files it may be desirable to
    iterate through the lines; that's where this module comes in.

INTERFACE
  "Path::Class::File->iterator"
    Get an iterator that returns the lines in a file. Returns "undef" when
    there are no more lines to return.

      my $iter = file( 'foo', 'bar' )->iterator;
      while ( defined( my $line = $iter->() ) ) {
        print "Line: $line\n";
      }

    If the file can not be opened an exception will be thrown (using
    "croak").

    The following options may be passed as key, value pairs:

    "chomp"
        Newlines will be trimmed from each line read.

    "iomode"
        Passed as the "mode" argument to "open". See Path::Class::File::open
        for details. If omitted defaults to 'r' (read-only).

    Here's how options are passed:

      my $chomper = file('foo', 'bar')->iterator( chomp => 1 );

  "Path::Class::File->next"
    Return the next line from a file. Returns "undef" when all lines have
    been read.

    Internally iterator is called if necessary to create a new iterator. The
    same options that iterator accepts may be passed to "next":

      my $file = file( 'foo', 'bar' );
      while ( defined( my $line = $file->next( chomp => 1 ) ) ) {
        print "Line: $line\n";
      }

   NOTE
    It may be tempting to use an idiom like:

      # DON'T DO THIS
      while ( my $line = file('foo')->next ) {
        ...
      }

    That will create a new "Path::Class::File" and, therefore, a new
    iterator each time it is called with the result that the first line of
    the file will be returned repeatedly.

  "Path::Class::File->each"
    Call a supplied callback for each line in a file. The same options that
    iterator accepts may be passed:

      file( 'foo', 'bar' )->each( chomp => 1, sub { print "Line: $_\n" } );

    Within the callback the current line will be in $_.

DEPENDENCIES
AUTHOR
    Andy Armstrong "<andy@hexten.net>"

LICENCE AND COPYRIGHT
    Copyright (c) 2010, Andy Armstrong "<andy@hexten.net>". All rights
    reserved.

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

DISCLAIMER OF WARRANTY
    BECAUSE THIS SOFTWARE IS LICENSED FREE OF CHARGE, THERE IS NO WARRANTY
    FOR THE SOFTWARE, TO THE EXTENT PERMITTED BY APPLICABLE LAW. EXCEPT WHEN
    OTHERWISE STATED IN WRITING THE COPYRIGHT HOLDERS AND/OR OTHER PARTIES
    PROVIDE THE SOFTWARE "AS IS" WITHOUT WARRANTY OF ANY KIND, EITHER
    EXPRESSED OR IMPLIED, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
    WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE. THE
    ENTIRE RISK AS TO THE QUALITY AND PERFORMANCE OF THE SOFTWARE IS WITH
    YOU. SHOULD THE SOFTWARE PROVE DEFECTIVE, YOU ASSUME THE COST OF ALL
    NECESSARY SERVICING, REPAIR, OR CORRECTION.

    IN NO EVENT UNLESS REQUIRED BY APPLICABLE LAW OR AGREED TO IN WRITING
    WILL ANY COPYRIGHT HOLDER, OR ANY OTHER PARTY WHO MAY MODIFY AND/OR
    REDISTRIBUTE THE SOFTWARE AS PERMITTED BY THE ABOVE LICENCE, BE LIABLE
    TO YOU FOR DAMAGES, INCLUDING ANY GENERAL, SPECIAL, INCIDENTAL, OR
    CONSEQUENTIAL DAMAGES ARISING OUT OF THE USE OR INABILITY TO USE THE
    SOFTWARE (INCLUDING BUT NOT LIMITED TO LOSS OF DATA OR DATA BEING
    RENDERED INACCURATE OR LOSSES SUSTAINED BY YOU OR THIRD PARTIES OR A
    FAILURE OF THE SOFTWARE TO OPERATE WITH ANY OTHER SOFTWARE), EVEN IF
    SUCH HOLDER OR OTHER PARTY HAS BEEN ADVISED OF THE POSSIBILITY OF SUCH
    DAMAGES.

