[Jprogramming] The Accessible Dictionary released

[Henry Rich]

0 1:} y

is the u} form of }, executing u to get the indexes to be modified.

0 1:} y   will be the same as
0 (1)} y

Henry Rich

On 1/20/2014 10:32 AM, Ian Clark wrote:
> Thanks, Brian, for answering Bo for me.
>
> Bo's question made me scratch my head.
> I did zeroco so long ago I've forgotten what I was thinking at the time.
>
>     0 1} i.6
> |rank error
> |       0 1}i.6
>     0 1:} i.6
> 0 0 2 3 4 5
>
> So the example is genuine: it works. But why???
> I tried covering 1: to see just what it gets called with...
>
>     one=: 3 : 0
> smoutput 'one' ; y
> 1
> :
> smoutput x ; 'one' ; y
> 1
> )
>     0 one} i.6
> ┌─┬───┬───────────┐
> │0│one│0 1 2 3 4 5│
> └─┴───┴───────────┘
> 0 0 2 3 4 5
>
> ...so (one) -- and therefore presumably 1: -- gets called dyadically with
> the 0 and the i.6
>
> But I have to admit I don't really know why it works :-)
> Perhaps I will when I've had my afternoon nap.
>
>
> On Mon, Jan 20, 2014 at 1:29 PM, Brian Schott <schott.brian at gmail.com>wrote:
>
>> Bo,
>>
>> Amend is an adverb that can take either a noun or a verb as its immediate
>> argument. The reason the first example fails is that when 0 1 is used,
>> amend takes the 0 and the 1 as its argument, not just the intended 1,
>> because the parser does not know to separate out the two numbers. But when
>> 1: is the supplied, because it is a verb and 0 is not, the correct result
>> is obtained.
>>
>>
>> On Mon, Jan 20, 2014 at 2:02 AM, Bo Jacoby <bojacoby at yahoo.dk> wrote:
>>
>>>
>>> Thanks for the http://www.jsoftware.com/jwiki/Vocabulary/zeroco . I have
>>> trouble in understanding the example
>>>
>>> 0 1} i.6      NB. Try to amend 1{i.6 to zero |rank error |       0 1}i.6
>>>   0 1:} i.6 0 0 2 3 4 5
>>> Is there a typo in the comment? ('{' versus '}')
>>>
>>> I thought that 0 1:} is a fork, but is is not:
>>>
>>>
>>>     (0 1: }) i.6
>>> |syntax error
>>> |   (    0 1:})i.6
>>>
>>> Is it a hook?
>>>     0 (1: }) i.6
>>> 0 0 2 3 4 5
>>>
>>>
>>> So I'm pretty confused.
>>> Thanks, Bo.
>>>
>>
>> --
>> (B=)
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