Re: Index-of function with structured left-argument

[Dr . Jürgen Sauermann]

Hi Elias, my best guess is that this is a missing RANK ERROR somewhere. I will look into it. Best Regards, Jürgen On 4/14/20 10:15 AM, Elias Mårtenson wrote: The ISO spec doesn't address what the index-of function should do when the left argument is not a scalar or a one-dimensional array. GNU APL extends this, but I don't really understand in what way. How am I to interpret the output from this?       (2 2 ⍴ 104 105 106 107) ⍳ (3 4 ⍴ 100+⍳100) ┏→━━━━━━━━━━━━━━━━━━━━━━┓ ↓┏⊖┓   ┏⊖┓   ┏⊖┓   ┏⊖┓  ┃ ┃┃0┃   ┃0┃   ┃0┃   ┃0┃  ┃ ┃┗━┛   ┗━┛   ┗━┛   ┗━┛  ┃ ┃┏→━━┓ ┏→━━┓ ┏→━━┓ ┏→━━┓┃ ┃┃0 0┃ ┃0 1┃ ┃1 0┃ ┃1 1┃┃ ┃┗━━━┛ ┗━━━┛ ┗━━━┛ ┗━━━┛┃ ┃┏⊖┓   ┏⊖┓   ┏⊖┓   ┏⊖┓  ┃ ┃┃0┃   ┃0┃   ┃0┃   ┃0┃  ┃ ┃┗━┛   ┗━┛   ┗━┛   ┗━┛  ┃ ┗∊━━━━━━━━━━━━━━━━━━━━━━┛ Regards, Elias