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Full Discussion: command line parameters
Top Forums UNIX for Dummies Questions & Answers command line parameters Post 302574962 by me. on Saturday 19th of November 2011 07:20:37 AM
Old 11-19-2011
I was trying with [ ] and if statements but your way is simple and works, great stuff!

---------- Post updated at 07:20 AM ---------- Previous update was at 07:10 AM ----------

I was trying with [ ] and if statements but your way is simple and works, great stuff!

actually it works great when there is no parameter VAR# predefined but when parameter is predefined script don show it . . . .
PHP Code:
#!/bin/bash
# write a script that takes command line variables and prints out the
# number of parameters passed in and lists them out on separated lines

VAR1=
VAR2="200"
VAR3=500




[ -"$VAR1] && read -"Enter VAR1 value:" VAR1
[ -"$VAR2] && read -"Enter VAR1 value:" VAR2         
[ -"$VAR3] && read -"Enter VAR1 value:" VAR3

exit 
like here it prompts to enter VAR1
but VAR2 and VAR3 are predefined and are not shown
 

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Pod::Simple::LinkSection(3pm)				 Perl Programmers Reference Guide			     Pod::Simple::LinkSection(3pm)

NAME
Pod::Simple::LinkSection -- represent "section" attributes of L codes SYNOPSIS
# a long story DESCRIPTION
This class is not of interest to general users. Pod::Simple uses this class for representing the value of the "section" attribute of "L" start-element events. Most applications can just use the normal stringification of objects of this class; they stringify to just the text content of the section, such as "foo" for "L<Stuff/foo>", and "bar" for "L<Stuff/bI<ar>>". However, anyone particularly interested in getting the full value of the treelet, can just traverse the content of the treeleet @$treelet_object. To wit: % perl -MData::Dumper -e "use base qw(Pod::Simple::Methody); sub start_L { print Dumper($_[1]{'section'} ) } __PACKAGE__->new->parse_string_document('=head1 L<Foo/bI<ar>baz>>') " Output: $VAR1 = bless( [ '', {}, 'b', bless( [ 'I', {}, 'ar' ], 'Pod::Simple::LinkSection' ), 'baz' ], 'Pod::Simple::LinkSection' ); But stringify it and you get just the text content: % perl -MData::Dumper -e "use base qw(Pod::Simple::Methody); sub start_L { print Dumper( '' . $_[1]{'section'} ) } __PACKAGE__->new->parse_string_document('=head1 L<Foo/bI<ar>baz>>') " Output: $VAR1 = 'barbaz'; SEE ALSO
Pod::Simple SUPPORT
Questions or discussion about POD and Pod::Simple should be sent to the pod-people@perl.org mail list. Send an empty email to pod-people-subscribe@perl.org to subscribe. This module is managed in an open GitHub repository, http://github.com/theory/pod-simple/ <http://github.com/theory/pod-simple/>. Feel free to fork and contribute, or to clone git://github.com/theory/pod-simple.git <git://github.com/theory/pod-simple.git> and send patches! Patches against Pod::Simple are welcome. Please send bug reports to <bug-pod-simple@rt.cpan.org>. COPYRIGHT AND DISCLAIMERS
Copyright (c) 2004 Sean M. Burke. This library is free software; you can redistribute it and/or modify it under the same terms as Perl itself. This program is distributed in the hope that it will be useful, but without any warranty; without even the implied warranty of merchantability or fitness for a particular purpose. AUTHOR
Pod::Simple was created by Sean M. Burke <sburke@cpan.org>. But don't bother him, he's retired. Pod::Simple is maintained by: o Allison Randal "allison@perl.org" o Hans Dieter Pearcey "hdp@cpan.org" o David E. Wheeler "dwheeler@cpan.org" perl v5.12.1 2010-05-07 Pod::Simple::LinkSection(3pm)
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