Code for parsing a key/value in in file from shell script

Question

I have a file that I need to look up a value by key using a shell script. The file looks like:

HereIsAKey This is the value

How can I do so

Answer 1

If you only need one variable at a time, you can do something like this:

#!/bin/bash
cat file | while read key value; do
  echo $key
  echo $value
done

The problem with this solution: The variables are only valid inside the loop. So don't try to do $key=$value and use it after the loop.

Update: Another way is I/O redirection:

exec 3