This is a tiny class that just bundles together my cd-aliases. cd-aliases are aliases that I use to cd into another directory. For instance, "pwdj" is an alias to cd into /Depot/j for me. I do not know if this is useful to anyone else out there, but you can provide your own cd-aliases in the form of a .yml file. My own .yml file is hardcoded by default. You can overrule this with the method: ExpandCdAliases.set_main_yaml_file() This expects the full path to the yaml file in question. Afterwards, call this method: ExpandCdAliases.load_dataset_from_main_file If you have specific suggestions to make this gem more useful for others, please drop me an email at: email@example.com. Thank you.