dowith – Ap­ply a com­mand to a list of items

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.