Are there simple versions of swap and of move_to_front that use C. , A. or (other)? My definitions use amend. Thank you, Dave.
1 5 swap 'abcdefgh' afcdebgh 3 move_to_front 'abc*ef' *abcef swap=: ({~ |.)~`[`]} move_to_front=: ((({~ _1&|.)~`[`]})~ i.@:>:)~ ---------------------------------------------------------------------- For information about J forums see http://www.jsoftware.com/forums.htm