Thanks, all, for the replies.
{"2 1 or {"_ 1 are indeed the corrections I needed to the verb in
question.
Sorry to have put my desired result inside a text definition. I did
that only because I write it inside the console, so I needed to avoid
execution. I was in a rush, too.
To summarize what I learned today:
(,/ q{"_ 1 c) -: ,/ (q { 0 { c) , (q { 1 { c) , (q { 2 { c) , (q { 3
{ c) ,: (q { 4 { c)
1
(,/ q { (0 1 2 3 4) { c) -: ,/ (q { 0 { c) , (q { 1 { c) , (q { 2 {
c) , (q { 3 { c) ,: (q { 4 { c)
0
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