So is this an accurate, if simplified, representation of what you want to do?
str0=. ,&.>'A';'B';'NG';'Yow' col2search=. ,&.>'A';'a';'AA';'B';'BB';'C';'CC';'Foo';'Zowie';'NG' col2search e. str0 1 0 0 1 0 0 0 0 0 1 str0 i. col2search NB. Which element of "str0" found where? (4 is not found) 0 4 4 1 4 4 4 4 4 2 The only real trick is raveling the elements of each item (,&.>) to ensure that they are all vectors. On Thu, Mar 29, 2012 at 4:29 PM, PackRat <pack...@anet.com> wrote: > I wrote: >> > That second problem was that I forgot that one cannot use "=" as a >> > Boolean comparison verb for literals (except for single characters). > > and Devon McCormick responded: >> This isn't true. > > I'm sorry, I used incorrect phraseology. My intent was NOT to state > that literals cannot be compared in a Boolean manner (i.e., a series of > Boolean values can be generated for the various comparisons). Of > course, they can. Rather, what I was thinking, but didn't clearly > state, is that I wanted a SINGLE Boolean value (true or false) for the > result of the entire comparison, regardless of the lengths of the two > literals. (In other languages, I'd be comparing strings for equality > or identity--just a simple true/false answer to act upon.) Hope this > clarifies! > > > Harvey > > ---------------------------------------------------------------------- > For information about J forums see http://www.jsoftware.com/forums.htm -- Devon McCormick, CFA ^me^ at acm. org is my preferred e-mail ---------------------------------------------------------------------- For information about J forums see http://www.jsoftware.com/forums.htm
