Henry Rich wrote:
>
> The key concept is that of 'item'. An array (no, wait, a
> non-atomic array) is a list of its items.
>
The only atomic array is a rank-0 array? This is non-atomic:
1 1 $ 42
right?
Many of J's primitives treat the items as unbreakable.
Henry Rich wrote:
>
> {. removes the first item. That leaves 0 items. The
> shape of an item remains unchanged, but there are still
> 0 of them.
>
Yes, I like this. Kind of the idea of type-safety. If I remove an item from
an array with shape 1 1
then the shape is 0 1. Just like if you goto the store they might have 4
baskets of apples, 3, or 2 or 1 or 0... but they could still have 0 baskets
of apples. which is different from 0 baskets of oranges :)
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