Say you want to list all the *.py, *.cc and *.h files.

You may use the command below.

find ./ -name '*.cc' -o -name '*.h' -o -name '*.py'

But there is always a better way! So, give a try to the option -regex.

find . -regex '.*\.\(cc\|h\|py\)'

What's the backslashes in expression used for?  Well, the find command uses emacs regular expression syntax!

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