Get strings from two files bash

Question

I have two files, one with url's other with id's

for line in $(cat urls_file); do
for id in $(cat ids_file); do
touch topic_$id
curl $line|grep "data\-topic=">topic_$id
done
done

BUT it does for every $line all the $id 's and i want to do for each line each id.

anubhava · Accepted Answer · 2015-08-11 05:09:57Z

2

BUT it does for every $line all the $id 's and i want to do for each line each id.

In that case you should use paste to have 2 column data from 2 input files:

while read -r line id; do
   curl "$line" | grep 'data-topic=' > "topic_$id"
done < <(paste urls_file ids_file)

There is no need to use touch as curl will create the file anyway.

answered Aug 11, 2015 at 5:09

anubhava

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