Rob Hodgkinson wrote:
> If the exercise is to find the index, remember the existing dyad verb i.
> 9 4 6 i. 4
> 1
>
> If the exercise is a tacit solution...
> idxof =: = # ([EMAIL PROTECTED]@[)
> 9 4 6 idxof 4
> 1
>
> NB: Does not handle a 'list' right argument (as indexOf also fails here)
>
>
Handling RA list
9 4 6 idxof"(_ 0) 4 4 6
1
1
2
J4F, more tacit:
ix=: [:I.]=[
9 4 6 ix"(_ 0) 4 4 6
1
1
2
+---+----------+
|@@i|a.{~q:9991|
+---+----------+
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