J displays <1 2 and , <1 2 identically -- you can't tell from the display that
the first is a scalar and the second is a one-element list. The utility bi
below boxes the items of non-scalars but displays scalars the way J does.
Experiment with this utility. Try bi i. 3 2 4 and bi <1 2 and
bi , <1 2 . And try bi on }. 2; < 2 4 $ i.8 and on {: 2; < 2 4 $ i.8
bi =: (<"_1)`]@.(''-:$) NB. box items of non-scalar arrays
--Kip Murray
Sent from my iPad
> On Oct 1, 2013, at 11:17 PM, Pascal Jasmin <[email protected]> wrote:
>
> I am taking the shape after I have opened the item. I'd expect it (the
> insides) to be the same whether I got the item from }. or {:
>
>
>
> ----- Original Message -----
> From: Roger Hui <[email protected]>
> To: Programming forum <[email protected]>
> Cc:
> Sent: Wednesday, October 2, 2013 12:00:27 AM
> Subject: Re: [Jprogramming] strange difference between }. and {:
>
> Not so strange. }. and {: are not equivalent, even on 2-element lists.
>
>
> On Tue, Oct 1, 2013 at 8:56 PM, Pascal Jasmin <[email protected]>wrote:
>
>> $ >@}. 2; < 2 4 $ i.8
>> 1 2 4
>> $ >@{: 2; < 2 4 $ i.8
>> 2 4
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> ----------------------------------------------------------------------
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>
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