Hi!
] y =: ((<1) ,<2) ,: (<<'abc'), <'bb'
┌─────┬──┐
│1 │2 │
├─────┼──┤
│┌───┐│bb│
││abc││ │
│└───┘│ │
└─────┴──┘
(6 [ ]) applyintree(<1 1) y
┌─────┬─┐
│1 │2│
├─────┼─┤
│┌───┐│6│
││abc││ │
│└───┘│ │
└─────┴─┘
(6 [ ]) applyintree(1 0; 0) y
|length error
| ((u applyintree(}.n))L:_1({.n) {y)({.n)}y
Details for appleintree verb:
https://code.jsoftware.com/wiki/Vocabulary/AmendingBoxedStructures
Nice day!
Sergey
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