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 don't have a grep that supports Perl-compatible regular expressions, the following seems to work:

VAR=$(grep "^$KEY " file | cut -d' ' -f2-)