Bob, Drat! I was hoping I could just take the expression: +/"1'abc'=/'abcbdefbbcbaa' Which works fine, and just turn it into a tacit verb definition without fiddling with it: ts1 =. +/"1'abc'=/] Or better yet: ts1 =. +/"1'abc'=/ Apparently, when I removed the noun argument, the phrase turned into a 'hook'.
I have no idea why this happened. Seems like you should be able to get a verb phrase working with an argument, and then remove the noun and add an assignment to make a tacit verb. Apparently it doesn't work that way though. Skip ---------------------------------------------------------------------- For information about J forums see http://www.jsoftware.com/forums.htm