The package provides macros for applying a command to all elements of a list without separators, such as ‘\DoWithAllIn{<cmd>}{<list-macro>}’, and also for extending and reducing macros storing such lists. Applications in mind belonged to LaTeX, but the package should work with other formats as well. Loop and list macros in other packages are discussed.

A further package, domore, is also provided, which enhances the functionality of dowith.

The author is Uwe Lück. The package is Copyright © 2011 Uwe Lück.