Y =: @:]
can be useful typing/reading productivity boost for tacit code
Y =: (&{::)(@:])
is a different useful version where 0 Y is equivalent to (0 {:: }). It picks
out the first element of Y and unboxes it. 1 Y is equivalent to (1 {:: ])
BEHOLD!
Y =: 1 : 'if. 3 = 4!:0 < ''u'' do. u@:] else. m {:: ] end.'
X =: 1 : 'if. 3 = 4!:0 < ''u'' do. u@:[ else. m {:: [ end.'
+/ Y
+/@:]
(0 Y - 1 Y + 2 Y) 6 2 3
1
(0 Y - 1 Y + 2 Y)
(0 {:: ]) - (1 {:: ]) + 2 {:: ]
3 (+:X * 0 Y - 1 Y + 2 Y) 6 2 3
6
If the u parameter to Y is a verb, use the first definition (@:]). Otherwise
use the 2nd (get index)
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