Re: loop through records

[Chris F.A. Johnson]

On Wed, 11 Mar 2009, OnTheEdge wrote:

> All, I'm trying to figure out how to loop through an array of records (if
> possible) and reference fields in that record, but I've only been able to
> reference the entire array (array[0]) or when assigned with parens, there is
> no concept of a row...
>
> #!/bin/bash
>
> array1="187431346 0323 mirrored 11866
> 187431346 0324 mirrored 11866
> 187431346 0325 mirrored 11866
> 187431346 0326 mirrored 11866"

      That is not an array; it is a scalar variable.

      To assign it to an array:

array1=( "187431346 0323 mirrored 11866"
 "187431346 0324 mirrored 11866"
 "187431346 0325 mirrored 11866"
 "187431346 0326 mirrored 11866"
)

> element_count1=${#array1[*]}
> echo $element_count1
>
> number_of_elements=${#array1[@]}
>
> echo '- ARRAY-1--------------------------------'
>
> for REC in "${array1[*]}"
> do
>  echo "Field 1: ${REC[0]}  Field 2: ${REC[1]}"
> done
>
> I would like to see something like this:
> Field 1: 187431346   Field 2: 0323
> Field 1: 187431346   Field 2: 0324
> Field 1: 187431346   Field 2: 0325
> Field 1: 187431346   Field 2: 0326

set -f  ## Prevent pathname expansion, (not necessary in this example)
for REC in "${array1[@]}"
do
  set -- $REC
  printf "Field 1: %s  Field 2: %s\n" "$1" "$2"
done

--
   Chris F.A. Johnson, webmaster         <http://woodbine-gerrard.com>
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