Re: [Bug-apl] box and unbox that work uniformly and without exceptions

[Blake McBride]

Thanks!

On Wed, May 14, 2014 at 3:43 AM, Jay Foad <address@hidden> wrote:

On 13 May 2014 15:00, Blake McBride <address@hidden> wrote:
> Here are the functions, examples to follow:
>
>       ∇box[⎕]∇
> [0] z←box x
> [1] z←⊂(⊂⍴x),⊂,x
>
>       ∇unbox[⎕]∇
> [0] z←unbox x
> [1] z←(⊃x[⎕IO])⍴⊃(x←⊃x)[⎕IO+1]

FYI you can write your box as: z←⊂(⍴x)(,x)
and unbox as: (s r)←⊃x ⋄ z←s⍴r

Jay.