Bash for loop with paired variables

Question

I have a directory with over 100 files that I have a list with a number that goes with each file. I want to run a for loop as such

numPairs="21 57 93... etc"
for filename in /directory/;
do
    $filename [numPairs[1]] > newfilename
done;

Is there a way to (say like in js, that's what I'm familiar with) call the numPairs item corresponding with the filename called in the for loop? Or would I be better creating another list with all of the filenames?

It's not clear to me what are you trying to do in this line: $filename [numPairs[1]] > newfilename — Nir Alfasi
– Nir Alfasi, Commented Aug 28, 2018 at 22:34
Is numPairs a string containing numbers delimited by whitespace? I'm also a bit befuddled by your code as it stands; please clarify. — ggorlen
– ggorlen, Commented Aug 28, 2018 at 22:36

KamilCuk · Accepted Answer · 2018-08-28 22:38:45Z

1

Bash is like:

numbers="21 57 93"
while IFS=$'\t' read -r num file; do
    echo "num=$num file=$file"
done < <(paste <(printf "%s\n" $numbers) <(printf "%s\n" /directory/*))

answered Aug 28, 2018 at 22:38

KamilCuk

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