Let's say you are importing a vector from OEIS: V=: 1, -1, -1, 0, -1, 1, -1, 0
Now, use find/replace to replace those - characters with _ characters: V=: 1, _1, _1, 0, _1, 1, _1, 0 Next, try to use find/replace to eliminate the commas: V=: 1_ _1_ _1_ 0_ _1_ 1_ _1_ 0 If you catch jqt re-inserting the _ that you deleted from the replace pattern, you can temporarily delete it again and can get the right result: V=: 1 _1 _1 0 _1 1 _1 0 The problems here are two: (1) That _ character keeps re-appearing in the replace pattern, and (2) undo only reverts a single replacement - it's not atomic even though the UI action you are trying to revert seemed to be an atomic action. If you had a large enough of a set of replacements you can forget about undo being a useful action. FYI, -- Raul ---------------------------------------------------------------------- For information about J forums see http://www.jsoftware.com/forums.htm
