Re: [Bug-apl] IOTA

[Nick Lobachevsky]

There is at least one other degenerate case, namely the "legacy"
singleton, or one element vector.  With a scalar argument, monadic
iota returns a result depth one.  With a vector argument, iota returns
a result depth two.  Except when there is only one element.

      ≡⍳⍳0 ⍝ can't find zilde
2
      ≡⍳⍳1 ⍝ singleton vector case returns result depth one
1
      ≡⍳,1
1
      ≡⍳,2
1
      ≡⍳,42
1
      ≡⍳(15⍴1)⍴1 ⍝ matrix singleton thankfully fails
RANK ERROR
      ≡⍳⍳2
2