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Top Forums Shell Programming and Scripting Variable substitution with arrays Post 303002495 by Kingzy on Friday 25th of August 2017 05:45:17 PM
Old 08-25-2017
Don: My apologies for the initial lack of info. I am also using MacOS Sierra.

I also tried running that script on my work shell.

Code:
[work@shell ~]$ ./loop.sh
./loop.sh: line 17: typeset: -n: invalid option
typeset: usage: typeset [-aAfFgilrtux] [-p] name[=value] ...
0
dog, animals
orange, fruits
juice, drinks
toronto, cities
canada, countries
1
dog,
orange,
juice,
toronto,
canada,
2
dog,
orange,
juice,
toronto,
canada,
3
dog,
orange,
juice,
toronto,
canada,
4
dog,
orange,
juice,
toronto,
canada,
[work@shell ~]$ bash --version
GNU bash, version 4.2.46(1)-release (x86_64-redhat-linux-gnu)
Copyright (C) 2011 Free Software Foundation, Inc.
License GPLv3+: GNU GPL version 3 or later <http://gnu.org/licenses/gpl.html>

This is free software; you are free to change and redistribute it.
There is NO WARRANTY, to the extent permitted by law.

Quote:
which just switches the inner and outer loops in the code I suggested before, changes the names of the arrays used as looping values, and adds code to add an empty line between groups. The above produces the output requested in post #4.
Thanks for the edit. I unfortunately do not have the option to rewrite the script my contrived example is based on from scratch. But I'll surely give ksh a try on another project! It seems to be more flexible than bash.

---------- Post updated at 05:45 PM ---------- Previous update was at 05:35 PM ----------

RudiC: Here is the code with typeset -n that I wasn't lucky with:

Code:
#!/bin/sh

declare -a index=(0 1 2 3 4);

declare -a animals=(dog cat horse penguin cow);

declare -a fruits=(orange apple grapes peach mango);

declare -a drinks=(juice milk coffee tea coke);

declare -a cities=(toronto paris london glasgow sydney);

declare -a countries=(canada france england scotland australia);

declare -a all=(animals fruits drinks cities countries);

typeset -n j

for i in "${index[@]}" ; do
  echo ${i};
  for j in "${all[@]}" ; do
    echo ${!j}, ${j[$i]};
  done;
done

It looks like neither shell at home or work has typeset -n Smilie
 

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RSORT(3)								 1								  RSORT(3)

rsort - Sort an array in reverse order

SYNOPSIS
bool rsort (array &$array, [int $sort_flags = SORT_REGULAR]) DESCRIPTION
This function sorts an array in reverse order (highest to lowest). PARAMETERS
o $array - The input array. o $sort_flags - You may modify the behavior of the sort using the optional parameter $sort_flags, for details see sort(3). RETURN VALUES
Returns TRUE on success or FALSE on failure. EXAMPLES
Example #1 rsort(3) example <?php $fruits = array("lemon", "orange", "banana", "apple"); rsort($fruits); foreach ($fruits as $key => $val) { echo "$key = $val "; } ?> The above example will output: 0 = orange 1 = lemon 2 = banana 3 = apple The fruits have been sorted in reverse alphabetical order. NOTES
Note This function assigns new keys to the elements in $array. It will remove any existing keys that may have been assigned, rather than just reordering the keys. SEE ALSO
arsort(3), krsort(3), The comparison of array sorting functions. PHP Documentation Group RSORT(3)
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