The proposal is for dyadic $ only.

Processing experimental data which sometimes arrives in irregular chunks I often end up with a vector.
   q: # data
helps me figure out how to match data to the experiment.  The proposal solves the case where one of the inner shape atoms is unknown.

If this is a sufficiently common situation, and Pascal shows interest, it might be a worthwhile extension.  On the other hand, the implementations presented meet need, and I have these.  It breaks only the unlikely programs that depend on _ triggering an error.  J need only check for infinity if x is float, and I'd think the engine already tests the type of x.

|On Tuesday, August 18, 2020, 07:51:03 p.m. EDT, Henry Rich <[email protected]> wrote:
|This is a proposed change only to dyad and $ , is that right?
|What problem does this solve?

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