Uses completion to list a set of relevant files depending on the flag provided e.g. -h for files in the home directory.
The f option will list files located in your home folder in the directory fast_file.
Once fast file is invoked it opens selected file with emacserver, and alternatively emacs if no server is available.
Source the main file into the environment:
source emacs_fast_file
List files to open in your home directory:
emacs_fast_file -h <tab>