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Top Forums Shell Programming and Scripting Problem with positional variables in BASH Post 302578761 by timmyyyyy on Friday 2nd of December 2011 09:12:15 AM
Old 12-02-2011
Problem with positional variables in BASH

Hello, my problem is simple & I searched a lot but I couldn't find anything about it:

Basically I'd like to pass $i to a variable, $i being the positional variable; but it is unknown in the beginning so I can't do it like eg. myvar=$3, it HAS to be the "i"..
First, I tried myvar=$($i) (because $i is the number of i (ex 5), and not the positional variable ($5) so we would need in theory another $ to get to the positional variable), doesn't work
I tried this also, though I'm not sure if it's correct:
Code:
myvar=${!($[2+$a])}

(in my code, i'd like myvar to get the (2+$a) number for the positional variable).

Thanks for any help, good day
Moderator's Comments:
Mod Comment Please try to use code tags!

Last edited by vbe; 12-02-2011 at 10:53 AM..
 

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Template::Plugin::YAML(3pm)				User Contributed Perl Documentation			       Template::Plugin::YAML(3pm)

NAME
Template::Plugin::YAML - Plugin interface to YAML SYNOPSIS
[% USE YAML %] [% YAML.dump(variable) %] [% YAML.dump_html(variable) %] [% value = YAML.undump(yaml_string) %] [% YAML.dumpfile(filename, variable) %] [% value = YAML.undumpfile(filename) %] DESCRIPTION
This is a simple Template Toolkit Plugin Interface to the YAML module. A YAML object will be instantiated via the following directive: [% USE YAML %] As a standard plugin, you can also specify its name in lower case: [% USE yaml %] METHODS
These are the methods supported by the YAML object. dump( @variables ) Generates a raw text dump of the data structure(s) passed [% USE Dumper %] [% yaml.dump(myvar) %] [% yaml.dump(myvar, yourvar) %] dump_html( @variables ) Generates a dump of the data structures, as per "dump", but with the characters <, > and & converted to their equivalent HTML entities, spaces converted to &nbsp; and newlines converted to <br>. [% USE yaml %] [% yaml.dump_html(myvar) %] undump( $string ) Converts a YAML-encoded string into the equivalent data structure. Here's a way to deep-copy a complex structure by completely serializing the data. [% USE yaml; yaml_string = yaml.dump(complex_data_structure); complex_copy = yaml.undump(yaml_string); %] dumpfile( $file, @variables ) Converts the data to YAML encoding, and dumps it to the specified filepath. [% USE yaml; yaml.dumpfile(".storage", my_data) %] undumpfile( $file ) Loads the YAML-encoded data from the specified filepath [% USE yaml; my_data = yaml.undumpfile(".storage") %] AUTHORS
Richard Clamp <richardc@unixbeard.net>, with undump, undumpfile, and dumpfile implementation by Randal L. Schwartz <merlyn@stonehenge.com> based on Simon Matthews' Template::Plugin::Dumper COPYRIGHT
Copyright 2003, 2008 Richard Clamp 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::Dumper perl v5.10.0 2008-12-15 Template::Plugin::YAML(3pm)
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