Read two-dimensional array by Bash script.

read_2d_array.sh

#!/usr/bin/env bash

## date:   2021-12-14
## author: duruyao@gmail.com
## desc:   read two-dimensional array by Bash script

data=(
  '00007887.JPEG JPEG 500x333 500x333+0+0 8-bit sRGB 81.6KB 0.000u 0:00.000'
  '00007893.JPEG JPEG 480x411 480x411+0+0 8-bit Grayscale Gray 256c 54KB 0.000u 0:00.000'
  '00007894.JPEG JPEG 500x375 500x375+0+0 8-bit sRGB 52.9KB 0.000u 0:00.000'
  '00007924.JPEG JPEG 500x375 500x375+0+0 8-bit Grayscale Gray 256c 53.5KB 0.000u 0:00.000'
  '00007929.JPEG JPEG 694x948 694x948+0+0 8-bit sRGB 356KB 0.000u 0:00.000'
  '00007944.JPEG JPEG 576x768 576x768+0+0 8-bit sRGB 95.4KB 0.000u 0:00.000'
)

rm -rf ./data.txt

## traverse a two-dimensional array
for line in "${data[@]}"; do
  ## write data to a file
  echo "${line}" >> ./data.txt
  its=( ${line} )
  for it in "${its[@]}"; do
    printf "%s!" "${it}"
  done
  printf "\n"
done

echo "-----------------------------------------------------------------------------------------"

## read a two-dimensional array from file (replace ` ` with `,`)
two_dim_array=( $(cat ./data.txt | grep -E "8-bit|sRGB" | sed "s/ /\,/g") )
## traverse a two-dimensional array
for line in "${two_dim_array[@]}"; do
  ## get a one-dimensional array (replace `,` with ` `)
  one_dim_array=( $(echo ${line} | sed "s/\,/ /g") )
  for it in "${one_dim_array[@]}"; do
      printf "%s|" "${it}"
  done
  printf "\n"
done