All the partitioning modifiers (\ /. \. ;. etc) allow u to be a gerund
that is applied cyclically to the partitions. Thus, +`-/. applies + and
- alternately.
All the modifiers, that is, except one. The simplest one. One that
perhaps wasn't thought of as partitioning, though it clearly does. It
partitions the y argument into cells.
If m"n had been defined consistently with the other partitioning
modifiers, we would be able to write +`-"_1 to have different verbs
applied to items. This would have saved dozens of emails over the years
searching for a good way to perform this often-needed operation.
The constant-verb would have to move somewhere else: m&n, m@n, and many
other places are free.
For the next language.
Henry Rich
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