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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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HTML::Template::Compiled::Reference(3pm)		User Contributed Perl Documentation		  HTML::Template::Compiled::Reference(3pm)

NAME
HTML::Template::Compiled::Reference - A quick reference for HTML::Template::Compiled syntax TAGSTYLES
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Each attribute can be written as attribute=foo attribute="some thing" attribute='some "thing"' NAME You can omit the 'name=' here. <%if var%>var<%elsif name=var2%>var4<%/if%> Can be used in all tags. ESCAPE <%= message escape=html %> <%= params escape=url %> <%= params escape=js %> <%= some_var escape=dump|html%> Can be used in "VAR"-tags. DEFAULT <%= this.var.might_be_undef default="my fault" %> Can be used in "VAR"-tags. ALIAS <%loop cds alias="cd" %><%= cd.title %><%/loop cds %> Can be used in "LOOP" and "WHILE". Works like "SET_VAR" and is short for <%loop cds %><%set_var cd value=_ %><%= cd.title %><%/loop cds %> Useful for nested loops. SET_VAR <%set_var myvar value=.another.var %> <%set_var myvar2 expr="60 * 60 * 24" %> This creates a variable similar to local() in perl. To use such a var or an alias in includes, you must use "USE_VARS" in the include. USE_VARS <!-- recognize myvar and myvar2 as variables not parameter stash --> <%use_vars myvar,myvar2 %> myvar: <%= myvar %> JOIN <%loop cds join=", " %><%= _.title%><%/loop cds%> can be used in "LOOP" BREAK <%loop cds break="3" %> <%= _.title%><%if __break__ %> </%if %> <%/loop cds%> Sets "__break__" to 1 every xth loop. Can be used in "LOOP", "WHILE" and "EACH" OPTIONS
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