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Re: [Bug-apl] box and unbox that work uniformly and without exceptions
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From: |
Jay Foad |
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Subject: |
Re: [Bug-apl] box and unbox that work uniformly and without exceptions |
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Date: |
Wed, 14 May 2014 09:43:36 +0100 |
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.
Re: [Bug-apl] box and unbox that work uniformly and without exceptions, Frederick H. Pitts, 2014/05/16