log data::dumper output to file Post: 302457336

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Top Forums Shell Programming and Scripting log data::dumper output to file Post 302457336 by durden_tyler on Monday 27th of September 2010 08:16:14 PM

09-27-2010

Registered User

Quote:

Originally Posted by LRoberts

... Could somebody show me an example of how to redirect the output to a log file?
...

Here's how you'd write the output (of Dumper or anything) to a file:

Code:

$ 
$ # show the content of the Perl program
$ cat -n tst.pl
     1    #!/usr/bin/perl -w
     2    use Data::Dumper;
     3    
     4    $x = "the quick brown fox jumps over the lazy dog"; # a scalar
     5    @y = qw(10 20 30 40);                               # an array
     6    %z = qw(ruby red emerald green sapphire blue);      # a hash
     7    
     8    # open a file to write the output of Dumper
     9    $file = "dumper.log";
    10    open (F, ">", $file) or die "Can't open $file for writing: $!"; 
    11    print F Dumper $x;
    12    print F Dumper @y;
    13    print F Dumper %z;
    14    # and we're done; close the file now
    15    close (F) or die "Can't close $file: $!";
$ 
$ 
$ # run the Perl program
$ perl tst.pl
$ 
$ # and now check the "dumper.log" file
$ cat dumper.log
$VAR1 = 'the quick brown fox jumps over the lazy dog';
$VAR1 = '10';
$VAR2 = '20';
$VAR3 = '30';
$VAR4 = '40';
$VAR1 = 'sapphire';
$VAR2 = 'blue';
$VAR3 = 'emerald';
$VAR4 = 'green';
$VAR5 = 'ruby';
$VAR6 = 'red';
$ 
$

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LEARN ABOUT CENTOS

template::plugin::dumper

Template::Plugin::Dumper(3)				User Contributed Perl Documentation			       Template::Plugin::Dumper(3)

NAME

       Template::Plugin::Dumper - Plugin interface to Data::Dumper

SYNOPSIS

	   [% USE Dumper %]

	   [% Dumper.dump(variable) %]
	   [% Dumper.dump_html(variable) %]

DESCRIPTION

       This is a very simple Template Toolkit Plugin Interface to the Data::Dumper module.  A "Dumper" object will be instantiated via the
       following directive:

	   [% USE Dumper %]

       As a standard plugin, you can also specify its name in lower case:

	   [% USE dumper %]

       The "Data::Dumper" "Pad", "Indent" and "Varname" options are supported as constructor arguments to affect the output generated.	See
       Data::Dumper for further details.

	   [% USE dumper(Indent=0, Pad="<br>") %]

       These options can also be specified in lower case.

	   [% USE dumper(indent=0, pad="<br>") %]

METHODS

       There are two methods supported by the "Dumper" object.	Each will output into the template the contents of the variables passed to the
       object method.

   dump()
       Generates a raw text dump of the data structure(s) passed

	   [% USE Dumper %]
	   [% Dumper.dump(myvar) %]
	   [% Dumper.dump(myvar, yourvar) %]

   dump_html()
       Generates a dump of the data structures, as per dump(), but with the characters <, > and & converted to their equivalent HTML entities and
       newlines converted to <br>.

	   [% USE Dumper %]
	   [% Dumper.dump_html(myvar) %]

AUTHOR

       Simon Matthews <sam@tt2.org>

COPYRIGHT

       Copyright (C) 2000 Simon Matthews.  All Rights Reserved.

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

SEE ALSO

       Template::Plugin, Data::Dumper

perl v5.16.3							    2011-12-20					       Template::Plugin::Dumper(3)