Re: bash array names with variables

2 dimensional arrays: e.g. a[$i][$j] = "X"

???

    Tim

On Sat, 2012-10-20 at 23:37 -0400, Robert Mckennon wrote:
> Is it possible to use a variables in an array name?
> 
> I'm having a hell of a time getting it to work.
> 
> for instance:   a_0[x], a_1[x]...etc  defined as: a_$i[x]
> 
> I use a loop to create the arrays a_$i
> and then try and access them with:
> 
> arrayname=a_$i
> nextarray=a_$(( $i + 1 ))
> 
> 
> I found I can get the data out of an array with a variable-name like
> so:   F[$i]=$(eval echo \${$arrayname[$N]})
> 
> and that works... (found that tip here
> http://www.linuxquestions.org/questions/programming-9/bash-loop-over-variable-array-names-705702/
> )
> 
> 
> But when trying to put data into the variable-named arrays is where
> I'm running into issues.
> 
>     52      if [ $j != $N ];
>     53       then
>     54        {
>     55        $nextarray[$k]=$(eval echo \${$arrayname[$j]})
>     56        k=$(( $k + 1 ))
>     57        }
>     58      fi
> 
>    ./random.sh: line 55: a_4[0]=: command not found
> 
> I've tried escaping it every way I can think of and google for, but
> I'm about done banging my head against the wall...
> 
> 
> Any suggestions???
> 
> Rob.
> 
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